chore(deps): bump the actions group across 1 directory with 3 updates

Bumps the actions group with 3 updates in the / directory: [actions/cache](https://github.com/actions/cache), [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) and [dawidd6/action-send-mail](https://github.com/dawidd6/action-send-mail).


Updates `actions/cache` from 6.0.0 to 6.1.0
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@2c8a9bd...55cc834)

Updates `dtolnay/rust-toolchain` from 67ef31d5b988238dd797d409d6f9574278e20537 to fa04a1451ff1842e2626ccb99004d0195b455a88
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@67ef31d...fa04a14)

Updates `dawidd6/action-send-mail` from 994f270325d4f7257aff241a35488ef54ba364a4 to c50dc4cc848ade21f848990889906d804fae78c5
- [Release notes](https://github.com/dawidd6/action-send-mail/releases)
- [Commits](dawidd6/action-send-mail@994f270...c50dc4c)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
- dependency-name: dtolnay/rust-toolchain
  dependency-version: fa04a1451ff1842e2626ccb99004d0195b455a88
  dependency-type: direct:production
  dependency-group: actions
- dependency-name: dawidd6/action-send-mail
  dependency-version: c50dc4cc848ade21f848990889906d804fae78c5
  dependency-type: direct:production
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/casket-pages.yml

@@ -36,7 +36,7 @@ jobs:
           cabal-version: '3.10'
 
       - name: Cache Cabal
-        uses: actions/cache@2c8a9bd7457de244a408f35966fab2fb45fda9c8 # v6.0.0
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: |
             ~/.cabal/packages

.github/workflows/panicbot-sweep.yml

@@ -41,7 +41,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537 # stable
+        uses: dtolnay/rust-toolchain@fa04a1451ff1842e2626ccb99004d0195b455a88 # stable
         with:
           toolchain: stable
 

.github/workflows/push-email-notify.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Send push notification email
-        uses: dawidd6/action-send-mail@994f270325d4f7257aff241a35488ef54ba364a4 # pinned
+        uses: dawidd6/action-send-mail@c50dc4cc848ade21f848990889906d804fae78c5 # pinned
         with:
           server_address: ${{ secrets.SMTP_HOST }}
           server_port: ${{ secrets.SMTP_PORT }}