Bump actions/cache from 4 to 6

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 6.
- [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/v4...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/android-build.yml

@@ -53,7 +53,7 @@ jobs:
           cache: 'gradle'
 
       - name: Cache Gradle
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: |
             ~/.gradle/caches

.github/workflows/ios-build.yml

@@ -71,7 +71,7 @@ jobs:
         run: gem install xcpretty
 
       - name: Cache CocoaPods
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cocoapods/repos

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
           bun-version: latest
       - name: Cache bun dependencies
         id: bun-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.bun/install/cache
           key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lockb') }}