Bump actions/cache from 3 to 4 in /.github/actions/prepare-repository

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](actions/cache@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>

.github/actions/prepare-repository/action.yml

@@ -8,7 +8,7 @@ runs:
   steps:
   - uses: actions/checkout@v4
   - name: restore_cache
-    uses: actions/cache@v3
+    uses: actions/cache@v4
     with:
       key: v3-dependencies-{{ checksum "yarn.lock" }}
       path: node_modules
@@ -21,13 +21,13 @@ runs:
     shell: bash
 
   - name: save_cache
-    uses: actions/cache@v3
+    uses: actions/cache@v4
     with:
       path: node_modules
       key: v3-dependencies-{{ checksum "yarn.lock" }}
 
   - name: restore_cache
-    uses: actions/cache@v3
+    uses: actions/cache@v4
     with:
       key: v3-docs-dependencies-{{ checksum "docs/yarn.lock" }}
       path: docs/node_modules
@@ -41,7 +41,7 @@ runs:
     shell: bash
 
   - name: save_cache
-    uses: actions/cache@v3
+    uses: actions/cache@v4
     with:
       path: docs/node_modules
       key: v3-docs-dependencies-{{ checksum "docs/yarn.lock" }}