Prefer official name PostgreSQL over Postgres

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -312,14 +312,14 @@ def supports_pgcrypto_uuid?
 
       def get_advisory_lock(lock_id) # :nodoc:
         unless lock_id.is_a?(Integer) && lock_id.bit_length <= 63
-          raise(ArgumentError, "Postgres requires advisory lock ids to be a signed 64 bit integer")
+          raise(ArgumentError, "PostgreSQL requires advisory lock ids to be a signed 64 bit integer")
         end
         query_value("SELECT pg_try_advisory_lock(#{lock_id})")
       end
 
       def release_advisory_lock(lock_id) # :nodoc:
         unless lock_id.is_a?(Integer) && lock_id.bit_length <= 63
-          raise(ArgumentError, "Postgres requires advisory lock ids to be a signed 64 bit integer")
+          raise(ArgumentError, "PostgreSQL requires advisory lock ids to be a signed 64 bit integer")
         end
         query_value("SELECT pg_advisory_unlock(#{lock_id})")
       end