(doc) dependabot - remove no longer needed exclusions

Author: slachiewicz

.github/dependabot.yml

@@ -23,13 +23,6 @@ updates:
   ignore:
     # Ignore Maven Core updates
     - dependency-name: "org.apache.maven:*"
-    # Ignore Maven 3.2.1+
-    - dependency-name: org.apache.maven.plugin-testing:maven-plugin-testing-tools
-      versions:
-        - ">=3.2.0"
-    - dependency-name: org.apache.maven.plugin-testing:maven-plugin-testing-harness
-      versions:
-        - ">=3.2.0"
 - package-ecosystem: "github-actions"
   directory: "/"
   schedule: