Fix for Validate Javadoc failing sometimes (#667)

Author: FriedJannik

.github/workflows/test-javadoc.yml

@@ -33,6 +33,7 @@ jobs:
           java-version: '17'
           distribution: 'adopt'
           cache: maven
-
+      - name: BaSyx Clean Install
+        run: mvn clean install -Dmaven.test.skip=true -T1C
       - name: Validate Javadoc
         run: mvn clean javadoc:javadoc