Revert "Temporarily update to rat-maven-plugin SNAPSHOT"

Apparently the SNAPSHOT is not deployed on repository.apache.org, so this breaks the build

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1736174 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/slingshot/pom.xml b/slingshot/pom.xml
index 38c887e..4b0aed9 100644
--- a/slingshot/pom.xml
+++ b/slingshot/pom.xml
@@ -65,7 +65,6 @@
             <plugin>
                 <groupId>org.apache.rat</groupId>
                 <artifactId>apache-rat-plugin</artifactId>
-                <version>0.12.0-SNAPSHOT</version>
                 <configuration>
                     <excludes>
                         <exclude>src/main/resources/SLING-INF/content/**/*.json</exclude>
@@ -73,6 +72,7 @@
                         <exclude>src/main/resources/SLING-INF/content/slingshot/resources/js/*.js</exclude>
                         <exclude>src/main/resources/SLING-INF/content/slingshot/resources/fonts/*.svg</exclude>
                         <exclude>src/test/resources/**.json</exclude>
+                        <exclude>**/*.woff2</exclude>
                     </excludes>
                 </configuration>
             </plugin>