correct XML declaration

Elliotte Rusty Harold · slachiewicz · commit b104da3c0733 · 2021-02-06T18:13:35.000+01:00
diff --git a/maven-jxr/pom.xml b/maven-jxr/pom.xml
@@ -1,4 +1,4 @@
-<?Xmlb version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 Licensed to the Apache Software Foundation (ASF) under one

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-<?Xmlb version="1.0" encoding="UTF-8"?>`
	`1`	`+<?xml version="1.0" encoding="UTF-8"?>`
`2`	`2`
`3`	`3`	`<!--`
`4`	`4`	`Licensed to the Apache Software Foundation (ASF) under one`