Bump xercesImpl from 2.6.2 to 2.12.2 in /maven-tagdoc-plugin

Bumps xercesImpl from 2.6.2 to 2.12.2.

---
updated-dependencies:
- dependency-name: xerces:xercesImpl
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/maven-tagdoc-plugin/pom.xml b/maven-tagdoc-plugin/pom.xml
index 667e901..45dba5c 100644
--- a/maven-tagdoc-plugin/pom.xml
+++ b/maven-tagdoc-plugin/pom.xml
@@ -56,7 +56,7 @@
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
-      <version>2.6.2</version>
+      <version>2.12.2</version>
       <scope>runtime</scope>
     </dependency>
     <dependency>