Bump xmlschema-core from 2.2.5 to 2.3.0

Bumps xmlschema-core from 2.2.5 to 2.3.0.

---
updated-dependencies:
- dependency-name: org.apache.ws.xmlschema:xmlschema-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 3b36870..9d5350f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -494,7 +494,7 @@
         <neethi.version>3.2.0</neethi.version>
         <woden.version>1.0M10</woden.version>
         <axiom.version>1.3.1-SNAPSHOT</axiom.version>
-        <xmlschema.version>2.2.5</xmlschema.version>
+        <xmlschema.version>2.3.0</xmlschema.version>
         <activation.version>1.2.1</activation.version>
         <ant.version>1.10.12</ant.version>
         <antlr.version>2.7.7</antlr.version>