Bump actions/cache from 2.1.7 to 3.0.2

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.7 to 3.0.2.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2.1.7...v3.0.2)

---
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/flutter_ci.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Cache Flutter
-        uses: actions/cache@v2.1.7
+        uses: actions/cache@v3.0.2
         with:
           path: /opt/hostedtoolcache/flutter
           key: ${{ runner.os }}-flutter-${{ env.FLUTTER_CHANNEL }}-${{ env.FLUTTER_VERSION }} 
@@ -32,7 +32,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Cache Flutter
-        uses: actions/cache@v2.1.7
+        uses: actions/cache@v3.0.2
         with:
           path: /opt/hostedtoolcache/flutter
           key: ${{ runner.os }}-flutter-${{ env.FLUTTER_CHANNEL }}-${{ env.FLUTTER_VERSION }} 
@@ -59,7 +59,7 @@ jobs:
           distribution: 'temurin'
           cache: 'gradle'
       - name: Cache Flutter
-        uses: actions/cache@v2.1.7
+        uses: actions/cache@v3.0.2
         with:
           path: /opt/hostedtoolcache/flutter
           key: ${{ runner.os }}-flutter-${{ env.FLUTTER_CHANNEL }}-${{ env.FLUTTER_VERSION }} 
@@ -82,7 +82,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Cache Flutter
-        uses: actions/cache@v2.1.7
+        uses: actions/cache@v3.0.2
         with:
           path: /Users/runner/hostedtoolcache/flutter
           key: ${{ runner.os }}-flutter-${{ env.FLUTTER_CHANNEL }}-${{ env.FLUTTER_VERSION }} 
@@ -112,7 +112,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Cache Flutter
-        uses: actions/cache@v2.1.7
+        uses: actions/cache@v3.0.2
         with:
           path: /opt/hostedtoolcache/flutter
           key: ${{ runner.os }}-flutter-${{ env.FLUTTER_CHANNEL }}-${{ env.FLUTTER_VERSION }}