Merge pull request #547 from better-together-org/postgis-ci

Update rubyonrails.yml postgis

Author: rsmithlal

.github/workflows/rubyonrails.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       postgres:
-        image: postgres:11-alpine
+        image: postgis/postgis:latest
         ports:
           - "5432:5432"
         env: