fix: use sha commit hash

Signed-off-by: Tomas Weiss <tomas.weiss2@gmail.com>

Author: tomkis

.github/workflows/build-agent.yaml

@@ -50,5 +50,5 @@ jobs:
 
     - name: Build and Push
       run: |
-        uvx --from "./beeai-platform/apps/beeai-cli" beeai build ./ --tag ghcr.io/${{ github.repository }}/my-agent:latest --no-import --multi-platform
-        docker push --force ghcr.io/${{ github.repository }}/my-agent:latest
+        uvx --from "./beeai-platform/apps/beeai-cli" beeai build ./ --tag ghcr.io/${{ github.repository }}/my-agent:${{ github.sha }} --no-import --multi-platform
+        docker push ghcr.io/${{ github.repository }}/my-agent:${{ github.sha }}