Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit 6c576ab.

Author: khmarbaise

pom.xml

@@ -30,7 +30,7 @@ under the License.
  </parent>
 
  <artifactId>maven-compiler-plugin</artifactId>
- <version>3.8.2-SNAPSHOT</version>
+ <version>3.8.1</version>
  <packaging>maven-plugin</packaging>
 
  <name>Apache Maven Compiler Plugin</name>
@@ -45,7 +45,7 @@ under the License.
  <connection>scm:git:https://gitbox.apache.org/repos/asf/maven-compiler-plugin.git</connection>
  <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/maven-compiler-plugin.git</developerConnection>
  <url>https://github.com/apache/maven-compiler-plugin/tree/${project.scm.tag}</url>
- <tag>HEAD</tag>
+ <tag>maven-compiler-plugin-3.8.1</tag>
  </scm>
  <issueManagement>
  <system>JIRA</system>