Examples use v1 instead of master

Co-Authored-By: Konrad Pabjan <konradpabjan@github.com>

README.md

@@ -66,7 +66,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: Set up JDK 1.8
-      uses: actions/setup-java@master
+      uses: actions/setup-java@v1
       with:
         java-version: 1.8
         server-id: github # Value of the distributionManagement/repository/id field of the pom.xml
@@ -77,7 +77,7 @@ jobs:
     - name: Publish to GitHub Packages Apache Maven
       run: mvn deploy
     - name: Set up Apache Maven Central
-      uses: actions/setup-java@master
+      uses: actions/setup-java@v1
       with: # running setup-java again overwrites the settings.xml
         java-version: 1.8
         server-id: maven