chore(skip-release): set version to 2.2.1-SNAPSHOT

Signed-off-by: GitHub Action <action@github.com>

Author: actions-user

gradle.properties

@@ -4,7 +4,7 @@ pluginName=Quarkus Tools
 pluginRepositoryUrl=https://github.com/redhat-developer/intellij-quarkus
 # SemVer format -> https://semver.org
 # NO SPACES AROUND THE EQUALS SIGN!!
-pluginVersion=2.2.0
+pluginVersion=2.2.1-SNAPSHOT
 # Supported build number ranges and IntelliJ Platform versions -> https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 pluginSinceBuild=233.11799
 #pluginUntilBuild=233.*