ci: use cagent-action@latest for writer agent

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

Author: dvdksn

.github/workflows/agent-writer.yml

@@ -25,7 +25,7 @@ jobs:
         run: npm ci
 
       - name: Run agent
-        uses: docker/cagent-action@v1.1.4
+        uses: docker/cagent-action@latest
         timeout-minutes: 15
         with:
           cagent-version: v1.20.3