FEAT: registering XML codec with POM file extension

POM is a file used by Maven; contains build information, such as required software dependencies, dependency scope, and packaging information.

Example:
```
load https://dl.google.com/dl/android/maven2/com/google/android/gms/play-services-auth-api-phone/16.0.0/play-services-auth-api-phone-16.0.0.pom
```

Author: Oldes

src/mezz/codec-xml.r

@@ -173,7 +173,7 @@ REBOL [
 register-codec [
 	name:  'XML
 	title: "Extensible Markup Language"
-	suffixes: [%.xml]
+	suffixes: [%.xml %.pom]
 
 	decode: function [
 		"Parses XML code and returns a tree of blocks"