Update zephyr.yml

Author: skarg

.github/workflows/zephyr.yml

@@ -14,7 +14,7 @@ jobs:
   test:
     name: Twister Tests
     runs-on: ubuntu-22.04
-    container: ghcr.io/zephyrproject-rtos/v0.26-branch
+    container: ghcr.io/zephyrproject-rtos/ci:v0.26-branch
     env:
       CMAKE_PREFIX_PATH: /opt/toolchains
     steps: