ci: Ignore release and gh-pages branches for CI build on push

.github/workflows/ci-build.yml

@@ -1,6 +1,11 @@
 name: Continous build - build and test on every push
 
-on: push
+on:
+  push:
+    branches-ignore:
+      - release
+      - 'releases/**'
+      - gh-pages
 
 jobs:
   build: