gradle.properties: note `pluginVersion` is in SemVer format

.github/template-cleanup/gradle.properties

@@ -3,6 +3,7 @@
 
 pluginGroup = %GROUP%
 pluginName = %NAME%
+# https://semver.org/ format
 pluginVersion = 0.0.1
 
 # See https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html

README.md

@@ -94,7 +94,7 @@ The project-specific configuration file [gradle.properties][file:gradle.properti
 | --------------------------- | ---------------------------------------------------------------------------------------------------------- |
 | `pluginGroup`               | Package name - after *using* the template, this will be set to `com.github.username.repo`.                 |
 | `pluginName`                | Plugin name displayed in the JetBrains Marketplace and the Plugins Repository.                             |
-| `pluginVersion`             | The current version of the plugin.                                                                         |
+| `pluginVersion`             | The current version of the plugin in [SemVer](https://semver.org/) format.                                 |
 | `pluginSinceBuild`          | The `since-build` attribute of the <idea-version> tag.                                                     |
 | `pluginUntilBuild`          | The `until-build` attribute of the <idea-version> tag.                                                     |
 | `pluginVerifierIdeVersions` | Versions of the IDEs that will be used with Plugin Verifier.                                               |

gradle.properties

@@ -3,6 +3,7 @@
 
 pluginGroup = org.jetbrains.plugins.template
 pluginName = IntelliJ Platform Plugin Template
+# https://semver.org/ format
 pluginVersion = 1.0.0
 
 # See https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html