Bump actions/cache from v2 to v2.1.4

.github/workflows/corretto.yml

@@ -16,13 +16,13 @@ jobs:
     - name: Install tar && gzip
       run: yum install -y tar gzip
     - uses: actions/checkout@v2
-    - uses: actions/cache@v2
+    - uses: actions/cache@v2.1.4
       with:
         path: ~/.gradle/caches
         key: ${{ runner.os }}-micronaut-core-gradle-${{ hashFiles('**/*.gradle') }}
         restore-keys: |
           ${{ runner.os }}-micronaut-core-gradle-
-    - uses: actions/cache@v2
+    - uses: actions/cache@v2.1.4
       with:
         path: ~/.gradle/wrapper
         key: ${{ runner.os }}-micronaut-core-wrapper-${{ hashFiles('**/*.gradle') }}

.github/workflows/dependency-update.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@v2.1.4
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}

.github/workflows/gradle.yml

@@ -22,7 +22,7 @@ jobs:
         java: ['8', '11', '15']
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@v2.1.4
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}