Bump netbeans.version from RELEASE270 to RELEASE280

Bumps `netbeans.version` from RELEASE270 to RELEASE280.

Updates `org.netbeans.modules:org-netbeans-modules-apisupport-harness` from RELEASE270 to RELEASE280

Updates `org.netbeans.external:updater` from RELEASE270 to RELEASE280

---
updated-dependencies:
- dependency-name: org.netbeans.modules:org-netbeans-modules-apisupport-harness
  dependency-version: RELEASE280
  dependency-type: direct:production
- dependency-name: org.netbeans.external:updater
  dependency-version: RELEASE280
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -77,7 +77,7 @@
         <skin.artifactId>maven-fluido-skin</skin.artifactId>
         <skin.version>2.0.0</skin.version>
         <!-- version of Apache NetBeans for harness build -->
-        <netbeans.version>RELEASE270</netbeans.version>
+        <netbeans.version>RELEASE280</netbeans.version>
         <javax.inject.version>1</javax.inject.version>
         <jdkbaseline>11</jdkbaseline>
         <mockito.version>5.18.0</mockito.version>