fix README.md and CI

Author: mulle-nat

.github/workflows/mulle-sde-ci.yml

@@ -28,7 +28,7 @@ jobs:
 
     - uses: actions/checkout@v4
 
-    - uses: mulle-sde/github-ci@v1
+    - uses: mulle-sde/github-ci@v2
 
     - name: List extensions
       run: |

src/mulle-c/github-actions/project/all/.github/workflows/mulle-sde-ci.yml

@@ -33,7 +33,7 @@ jobs:
 
     - uses: actions/checkout@v4
 
-    - uses: mulle-sde/github-ci@v1
+    - uses: mulle-sde/github-ci@v2
 
     - name: Dump Project Environment
       run:  |