Fix boot up rails tests, use Postgres 11 since rails test schema has incompatible code to postgres 10

ActiveRecord::JDBCError: org.postgresql.util.PSQLException: ERROR: syntax error at or near "FUNCTION"
  Position: 140
                execute at arjdbc/jdbc/RubyJdbcConnection.java:775

Author: JesseChavez

.github/workflows/ruby.yml

@@ -84,7 +84,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:10
+        image: postgres:11
         env:
           POSTGRES_PASSWORD: postgres
           POSTGRES_HOST_AUTH_METHOD: trust
@@ -211,7 +211,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:10
+        image: postgres:11
         env:
           POSTGRES_PASSWORD: postgres
           POSTGRES_HOST_AUTH_METHOD: trust