Bump actions/cache from 3 to 4 (#6229)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/discord-release-notify.yml

@@ -18,7 +18,7 @@ jobs:
           php-version: 8.2
 
       - name: Restore Composer package cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/composer/files

.github/workflows/draft-release.yml

@@ -25,7 +25,7 @@ jobs:
           php-version: ${{ matrix.php-version }}
 
       - name: Restore Composer package cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/composer/files

.github/workflows/main-php-matrix.yml

@@ -37,7 +37,7 @@ jobs:
           pm-version-major: ${{ inputs.pm-version-major }}
 
       - name: Restore Composer package cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/composer/files
@@ -69,7 +69,7 @@ jobs:
           pm-version-major: ${{ inputs.pm-version-major }}
 
       - name: Restore Composer package cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/composer/files
@@ -103,7 +103,7 @@ jobs:
           pm-version-major: ${{ inputs.pm-version-major }}
 
       - name: Restore Composer package cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/composer/files
@@ -135,7 +135,7 @@ jobs:
           pm-version-major: ${{ inputs.pm-version-major }}
 
       - name: Restore Composer package cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/composer/files