Bump to v2026dev2

Signed-off-by: Apertis CI <devel@lists.apertis.org>

.gitlab-ci.yml

 variables:
   osname: apertis
-  release: v2026dev1
+  release: v2026dev2
 
 include:
   - project: tests/helper-tools
-    ref: apertis/v2026dev1
+    ref: apertis/v2026dev2
     file: /gitlab-ci/update-test-binaries.yaml
 
 update-test-binaries: