Limit Dependency Graph support to Gradle v5.2.1 or higher

src/resources/init-scripts/gradle-build-action.github-dependency-graph.init.gradle

@@ -6,8 +6,8 @@ if (getVariable('GITHUB_DEPENDENCY_GRAPH_ENABLED') != "true") {
 }
 
 // Do not run for unsupported versions of Gradle
-if (GradleVersion.current().baseVersion < GradleVersion.version("5.0")) {
-  println "::warning::Dependency Graph is not supported for Gradle versions < 5.0. No dependency snapshot will be generated."
+if (GradleVersion.current() < GradleVersion.version("5.2.1")) {
+  println "::warning::Dependency Graph is not supported for ${GradleVersion.current()}. Minimum supported Gradle version is v5.2.1. No dependency snapshot will be generated. "
   return
 }