gradle.properties cleanup

.github/template-cleanup/gradle.properties

@@ -4,10 +4,14 @@
 pluginGroup = %GROUP%
 pluginName = %NAME%
 pluginVersion = 0.0.1
+
+# See https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html#intellij-platform-based-products-of-recent-ide-versions
+# for insight into build numbers and IntelliJ Platform versions.
 pluginSinceBuild = 202
-pluginUntilBuild = 203.*
+pluginUntilBuild = 211.*
+
 # Plugin Verifier integration -> https://github.com/JetBrains/gradle-intellij-plugin#plugin-verifier-dsl
-# See https://jb.gg/intellij-platform-builds-list for available build versions
+# See https://jb.gg/intellij-platform-builds-list for available build versions.
 pluginVerifierIdeVersions = 2020.2.4, 2020.3.4, 2021.1.1
 
 platformType = IC