SLING-8427: add Forward filter scope to CacheControlFilter.

Update the exported version of o.a.s.dynamicinclude. The build started
failing after the merge, even though the PR build was successful.
diff --git a/src/main/java/org/apache/sling/dynamicinclude/package-info.java b/src/main/java/org/apache/sling/dynamicinclude/package-info.java
index ddd4e73..70512f2 100644
--- a/src/main/java/org/apache/sling/dynamicinclude/package-info.java
+++ b/src/main/java/org/apache/sling/dynamicinclude/package-info.java
@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-@Version("4.2.0")
+@Version("4.2.1")
 package org.apache.sling.dynamicinclude;
 import aQute.bnd.annotation.Version;