Bump net.sf.saxon:Saxon-HE from 12.5 to 12.6

Bumps net.sf.saxon:Saxon-HE from 12.5 to 12.6.

---
updated-dependencies:
- dependency-name: net.sf.saxon:Saxon-HE
  dependency-version: '12.6'
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -534,7 +534,7 @@
         <dependency>
           <groupId>net.sf.saxon</groupId>
           <artifactId>Saxon-HE</artifactId>
-          <version>12.5</version>
+          <version>12.6</version>
           <scope>test</scope>
         </dependency>
       </dependencies>