chore(skip-release): set version to 0.3.1-SNAPSHOT

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

gradle.properties

@@ -4,7 +4,7 @@ pluginName=LSP4IJ
 pluginRepositoryUrl=https://github.com/redhat-developer/lsp4ij
 # SemVer format -> https://semver.org
 # NO SPACES AROUND THE EQUALS SIGN!!
-pluginVersion=0.3.0
+pluginVersion=0.3.1-SNAPSHOT
 # Supported build number ranges and IntelliJ Platform versions -> https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 pluginSinceBuild=232
 #pluginUntilBuild=233.*