Small fixes

Readme.md

@@ -31,6 +31,8 @@ You can download IntelliJ from [here](https://www.jetbrains.com/de-de/idea/). Th
 6. Apply & save
 7. Click on the green Play-Button to start the application
 
+You can also open the Gradle tab on the right sidebar and choose `Tasks -> application -> run`.
+
 If IntelliJ does not find the installation directory of Gradle do the following:
 
 1. Go to `File -> Settings -> Build, Execution, Deployment -> Build Tools -> Gradle`

gradle/wrapper/gradle-wrapper.properties

 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists