Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [zizmorcore/zizmor-action](https://github.com/zizmorcore/zizmor-action) and [actions/cache](https://github.com/actions/cache).


Updates `zizmorcore/zizmor-action` from 0.5.6 to 0.5.7
- [Release notes](https://github.com/zizmorcore/zizmor-action/releases)
- [Commits](zizmorcore/zizmor-action@5f14fd0...192e21d)

Updates `actions/cache` from 5 to 6
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

---
updated-dependencies:
- dependency-name: zizmorcore/zizmor-action
  dependency-version: 0.5.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Run zizmor 🌈
-        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
+        uses: zizmorcore/zizmor-action@192e21d79ab29983730a13d1382995c2307fbcaa # v0.5.7
         with:
           persona: pedantic
 
@@ -158,7 +158,7 @@ jobs:
         run: |
           dart pub get
           dart analyze
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: dart/.dart_tool/hooks_runner/
           key: hooks-${{ matrix.os }}-${{ hashFiles('dart/pubspec.lock') }}
@@ -208,7 +208,7 @@ jobs:
           dart pub get
           dart analyze
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: dart/.dart_tool/hooks_runner/
           key: hooks-${{ matrix.os }}-${{ hashFiles('dart/pubspec.lock') }}