Use Java 26

And not Java 25 anymore.

.github/workflows/maven-verify.yml

diff --git a/.github/workflows/maven-verify.yml b/.github/workflows/maven-verify.yml
index 62047f2..c8fe666 100644
--- a/.github/workflows/maven-verify.yml
+++ b/.github/workflows/maven-verify.yml
@@ -39,13 +39,13 @@
             11
             17
             21
-            25
+            26
         type: string
 
       jdk-matrix:
         description: jdk matrix as json array
         required: false
-        default: '[ "21", "25", "8" ]'
+        default: '[ "21", "26", "8" ]'
         type: string
 
       jdk-distribution-matrix:
@@ -134,7 +134,7 @@
           11
           17
           21
-          25
+          26
         type: string
 
       ff-jdk: