Bump actions/cache from 1 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 1 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v1...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>

.github/workflows/plugin-test.yml

@@ -210,7 +210,7 @@ jobs:
         id: composer-cache
         run: |
           echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -359,7 +359,7 @@ jobs:
         id: composer-cache
         run: |
           echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -511,7 +511,7 @@ jobs:
         id: composer-cache
         run: |
           echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}