Merge pull request #7 from apache/dependabot/github_actions/actions/upload-artifact-2.3.1

diff --git a/.github/workflows/maven-ci.yml b/.github/workflows/maven-ci.yml
index 23cd6ac..b43d9fc 100644
--- a/.github/workflows/maven-ci.yml
+++ b/.github/workflows/maven-ci.yml
@@ -35,7 +35,7 @@
         uses: actions/checkout@v2
 
       - name: Set up cache for ~./m2/repository
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.7
         with:
           path: ~/.m2/repository
           key: maven-${{ matrix.os }}-java${{ matrix.java }}-${{ hashFiles('**/pom.xml') }}
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 0973027..4c27431 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -16,7 +16,7 @@
 
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2.1.7
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}