Rename property to address naming clash

Author: wilkinsona

.github/actions/publish-to-plugin-portal/action.yml

@@ -35,4 +35,4 @@ runs:
     - name: Publish
       shell: bash
       working-directory: ${{ github.action_path }}
-      run: ${{ github.workspace }}/gradlew publishExisting -Pgradle.publish.key=${{ inputs.gradle-plugin-publish-key }} -Pgradle.publish.secret=${{ inputs.gradle-plugin-publish-secret }} -PpluginVersion=${{ inputs.plugin-version }} -PrepositoryRoot=${{ github.workspace }}/gradle-plugin-portal
+      run: ${{ github.workspace }}/gradlew publishExisting -Pgradle.publish.key=${{ inputs.gradle-plugin-publish-key }} -Pgradle.publish.secret=${{ inputs.gradle-plugin-publish-secret }} -PdependencyManagementPluginVersion=${{ inputs.plugin-version }} -PrepositoryRoot=${{ github.workspace }}/gradle-plugin-portal

.github/actions/publish-to-plugin-portal/build.gradle

@@ -5,8 +5,8 @@ plugins {
 tasks.register("publishExisting", com.gradle.publish.PublishExistingTask) {
 	pluginId = "io.spring.dependency-management"
 	fileRepositoryRoot = new File("${repositoryRoot}")
-	pluginVersion = "${pluginVersion}"
-	pluginCoordinates = "io.spring.gradle:dependency-management-plugin:${pluginVersion}"
+	pluginVersion = "${dependencyManagementPluginVersion}"
+	pluginCoordinates = "io.spring.gradle:dependency-management-plugin:${dependencyManagementPluginVersion}"
 	displayName = "Dependency Management Plugin"
 	pluginDescription = "A Gradle plugin that provides Maven-like dependency management functionality"
 	website = "https://github.com/spring-gradle-plugins/dependency-management-plugin"