test(updater): Accept either main or master as sentry-cli main branch (#167)

The `writes output` / `writes to env:GITHUB_OUTPUT` tests assert against
the live state of getsentry/sentry-cli via `git ls-remote`. Whether the
script reports `main` or `master` depends on which of the two currently
points at the upstream HEAD, which flips over time. PR #165 baked
`main` into the assertion while both happened to point at HEAD; sentry-cli
has since diverged and post-merge CI on main now reports `master`,
failing the test.

Accept either branch name so the test isn't coupled to transient
upstream branch state.

Author: vaind

updater/tests/update-dependency.Tests.ps1

@@ -220,7 +220,9 @@ switch ($action)
                 $output | Should -Contain 'latestTag=0.28.0'
                 $output | Should -Contain 'latestTagNice=v0.28.0'
                 $output | Should -Contain 'url=https://github.com/getsentry/sentry-cli'
-                $output | Should -Contain 'mainBranch=main'
+                # sentry-cli has both `main` and `master`; which one is reported depends on
+                # which currently points at HEAD upstream, so accept either.
+                ($output | Where-Object { $_ -like 'mainBranch=*' }) | Should -BeIn @('mainBranch=main', 'mainBranch=master')
             }
         }