update readme with quotes and carrots (while in the forked repo this time)

Author: Leo Folsom

README.md

@@ -112,13 +112,13 @@ $ data-diff \
 
 | Database      | Connection string                                                                       | Status |
 |---------------|-----------------------------------------------------------------------------------------|--------|
-| PostgreSQL    | `postgresql://user:password@hostname:5432/database`                                     |  💚    |
-| MySQL         | `mysql://user:password@hostname:5432/database`                                          |  💚    |
-| Snowflake     | `snowflake://user:password@account/database/SCHEMA?warehouse=WAREHOUSE&role=role`       |  💚    |
-| Oracle        | `oracle://username:password@hostname/database`                                          |  💛    |
-| BigQuery      | `bigquery://project/dataset`                                                            |  💛    |
-| Redshift      | `redshift://username:password@hostname:5439/database`                                   |  💛    |
-| Presto        | `presto://username:password@hostname:8080/database`                                     |  💛    |
+| PostgreSQL    | `postgresql://<user>:<password>@<hostname>:<5432>/<database>`                           |  💚    |
+| MySQL         | `mysql://<user>:<password>@<hostname>:<5432>/<database>`                                |  💚    |
+| Snowflake     | `"snowflake://<user>:<password>@<account>/<database>/<SCHEMA>?warehouse=<WAREHOUSE>&role=<role>"`|  💚    |
+| Oracle        | `oracle://<username>:<password>@<hostname>/database`                                          |  💛    |
+| BigQuery      | `bigquery://<project>/<dataset>`                                                            |  💛    |
+| Redshift      | `redshift://<username>:<password>@<hostname>:<5439>/<database>`                                   |  💛    |
+| Presto        | `presto://<username>:<password>@<hostname>:8080/<database>`                                     |  💛    |
 | ElasticSearch |                                                                                         |  📝    |
 | Databricks    |                                                                                         |  📝    |
 | Planetscale   |                                                                                         |  📝    |