fix: update workflows (#382)

Signed-off-by: Goetz Goerisch <g.goerisch@vdw.de>

Author: GoetzGoerisch

.github/workflows/Dockerbuild.yml .github/workflows/build_containers.yml

@@ -1,9 +1,7 @@
 ---
-name: Build container image
+name: Build container images
 
 on:
-  schedule:
-    - cron: "23 9 * * *"
   push:
     branches: [develop]
   pull_request:

.github/workflows/cleanup_containers.yml

@@ -12,7 +12,7 @@ permissions:
 
 jobs:
   build:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
 
     steps:
       - uses: actions/github-script@v7.0.1