Update actions/cache requirement to v2.1.3 (#8543)

Merge pull request 8543

.github/workflows/ci.yml

@@ -84,7 +84,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby_version }}
     - name: Cache dependencies
-      uses: actions/cache@v1
+      uses: actions/cache@v2.1.3
       with:
         path: vendor/bundle
         key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}

.github/workflows/docs.yml

@@ -19,7 +19,7 @@ jobs:
           ruby-version: ${{ env.RUBY_VERSION }}
       - name: Setup cache for Bundler
         id: cache
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.3
         with:
           path: vendor/bundle
           key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}

.github/workflows/third-party.yml

@@ -27,7 +27,7 @@ jobs:
       with:
         ruby-version: 2.7
     - name: Set up Dependencies Cache
-      uses: actions/cache@v1
+      uses: actions/cache@v2.1.3
       with:
         path: sandbox/vendor/bundle
         key: ubuntu-latest-gems-${{ hashFiles('**/Gemfile.lock') }}