build(deps): bump net.sf.saxon:Saxon-HE from 12.8 to 12.9

Bumps net.sf.saxon:Saxon-HE from 12.8 to 12.9.

---
updated-dependencies:
- dependency-name: net.sf.saxon:Saxon-HE
  dependency-version: '12.9'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

plc4c/pom.xml

@@ -160,7 +160,7 @@
           <dependency>
             <groupId>net.sf.saxon</groupId>
             <artifactId>Saxon-HE</artifactId>
-            <version>12.8</version>
+            <version>12.9</version>
           </dependency>
         </dependencies>
       </plugin>

protocols/knxnetip/pom.xml

@@ -154,7 +154,7 @@
               <dependency>
                 <groupId>net.sf.saxon</groupId>
                 <artifactId>Saxon-HE</artifactId>
-                <version>12.8</version>
+                <version>12.9</version>
               </dependency>
             </dependencies>
           </plugin>

protocols/opcua/pom.xml

@@ -237,7 +237,7 @@
               <dependency>
                 <groupId>net.sf.saxon</groupId>
                 <artifactId>Saxon-HE</artifactId>
-                <version>12.8</version>
+                <version>12.9</version>
               </dependency>
             </dependencies>
           </plugin>