Update docker-scheduled.yml from release/16.6 to release/17.0

Author: oliverguenther

.github/workflows/docker-scheduled.yml

@@ -16,8 +16,8 @@ jobs:
   build-release-candidate:
     # References to release/X.Y and X.Y-rc are being
     # updated from the devkit (UpdateWorkflows step) whenever a new release branch is created
-    uses: opf/openproject/.github/workflows/docker.yml@release/16.6
+    uses: opf/openproject/.github/workflows/docker.yml@release/17.0
     with:
-      branch: release/16.6
-      tag: 16.6-rc
+      branch: release/17.0
+      tag: 17.0-rc
     secrets: inherit