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

diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 5f95183..4c27431 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -29,7 +29,7 @@
     - name: Build with Maven
       run: mvn -B package --file pom.xml
     - name: Upload Maven build artifact
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v2.3.1
       with:
         name: asf-gitpubsub-jenkins.hpi
         path: target/asf-gitpubsub-jenkins.hpi