update documentation

Author: dmitry-shibanov

README.md

@@ -163,20 +163,10 @@ jobs:
       - uses: actions/setup-java@v3
         with:
           distribution: '<distribution>'
-          java-version: 8
-      - run: echo "JAVA_8=$JAVA_HOME" >> $GITHUB_ENV
-  
-      - uses: actions/setup-java@v3
-        with:
-          distribution: '<distribution>'
-          java-version: 11
-      - run: echo "JAVA_11=$JAVA_HOME" >> $GITHUB_ENV
-  
-      - uses: actions/setup-java@v3
-        with:
-          distribution: '<distribution>'
-          java-version: 15
-      - run: echo "JAVA_15=$JAVA_HOME" >> $GITHUB_ENV
+          java-version: |
+            8
+            11
+            15
 ```
 
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