Add conditional check for docker push

Signed-off-by: Sayali Gaikawad <gaiksaya@amazon.com>

.github/workflows/docker.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   docker:
+    if: github.repository == 'opensearch-project/opensearch-ci'
     runs-on: ubuntu-latest
     steps:
       -