chore(deps): bump github.com/coder/serpent from 0.14.0 to 0.15.0 (#345)

Bumps [github.com/coder/serpent](https://github.com/coder/serpent) from
0.14.0 to 0.15.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/coder/serpent/commit/40b60bf4c1495caddc0292f862de275da292e6aa"><code>40b60bf</code></a>
Merge pull request <a
href="https://redirect.github.com/coder/serpent/issues/32">#32</a> from
coder/fix/allow-empty-env-values</li>
<li><a
href="https://github.com/coder/serpent/commit/e9b06829ec563f79b757fd4e82ddf558b7075a4c"><code>e9b0682</code></a>
test: add ValueSource assertions and unset env var test</li>
<li><a
href="https://github.com/coder/serpent/commit/00997cc0479fb5e65d4c58ef785c54e9ae95e59c"><code>00997cc</code></a>
fix: allow empty environment variable values to override defaults</li>
<li>See full diff in <a
href="https://github.com/coder/serpent/compare/v0.14.0...v0.15.0">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=github.com/coder/serpent&package-manager=go_modules&previous-version=0.14.0&new-version=0.15.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ethan Dickson <ethan@coder.com>

Author: dependabot[bot]

go.mod

@@ -6,7 +6,7 @@ require (
 	cdr.dev/slog/v3 v3.0.0
 	github.com/coder/coder/v2 v2.32.1
 	github.com/coder/retry v1.5.1
-	github.com/coder/serpent v0.14.0
+	github.com/coder/serpent v0.15.0
 	github.com/coder/websocket v1.8.14
 	github.com/docker/docker v28.5.2+incompatible
 	github.com/docker/go-connections v0.7.0

go.sum

@@ -124,8 +124,8 @@ github.com/coder/pretty v0.0.0-20230908205945-e89ba86370e0 h1:3A0ES21Ke+FxEM8CXx
 github.com/coder/pretty v0.0.0-20230908205945-e89ba86370e0/go.mod h1:5UuS2Ts+nTToAMeOjNlnHFkPahrtDkmpydBen/3wgZc=
 github.com/coder/retry v1.5.1 h1:iWu8YnD8YqHs3XwqrqsjoBTAVqT9ml6z9ViJ2wlMiqc=
 github.com/coder/retry v1.5.1/go.mod h1:blHMk9vs6LkoRT9ZHyuZo360cufXEhrxqvEzeMtRGoY=
-github.com/coder/serpent v0.14.0 h1:g7vt2zBMp3nWyAvyhvQduaI53Ku65U3wITMi01+/8pU=
-github.com/coder/serpent v0.14.0/go.mod h1:7OIvFBYMd+OqarMy5einBl8AtRr8LliopVU7pyrwucY=
+github.com/coder/serpent v0.15.0 h1:jobR7DnPsxzEMD0cRiailwlY+4v6HAPS/8emIgBpaIU=
+github.com/coder/serpent v0.15.0/go.mod h1:7OIvFBYMd+OqarMy5einBl8AtRr8LliopVU7pyrwucY=
 github.com/coder/terraform-provider-coder/v2 v2.15.0 h1:sdKV3JvwlL7FNuSfaba0pm2WsPTBG7d0H6lmbzX+q4M=
 github.com/coder/terraform-provider-coder/v2 v2.15.0/go.mod h1:++c+FmMAFj8+H8lxstoaGBmTM3YFSxnVRxSkkdAG+YA=
 github.com/coder/websocket v1.8.14 h1:9L0p0iKiNOibykf283eHkKUHHrpG7f65OE3BhhO7v9g=

integration/integration.go

@@ -156,7 +156,7 @@ func StartCoder(ctx context.Context, t *testing.T, name string, options ...func(
 			t.Logf("not ready yet: %s", err.Error())
 		}
 		return err == nil
-	}, 30*time.Second, time.Second, "coder failed to become ready in time")
+	}, 90*time.Second, time.Second, "coder failed to become ready in time")
 	_, err = client.CreateFirstUser(ctx, codersdk.CreateFirstUserRequest{
 		Email:    testEmail,
 		Username: testUsername,