docs(development): replace hardcoded dev db password with reference to docker-compose

GitGuardian flagged the literal default password added to docs/development.md.
Replaced with a pointer to local_database/docker-compose.yml where it is already defined.

Author: labradorite-dev

docs/development.md

@@ -35,14 +35,14 @@ At minimum, you need the database connection variables:
 
 ```dotenv
 POSTGRES_USER=test_source_collector_user
-POSTGRES_PASSWORD=HanviliciousHamiltonHilltops
+POSTGRES_PASSWORD=<see local_database/docker-compose.yml>
 POSTGRES_DB=source_collector_test_db
 POSTGRES_HOST=127.0.0.1
 POSTGRES_PORT=5432
 DEV=true
 ```
 
-These match the defaults in `local_database/docker-compose.yml`.
+The password and other defaults are defined in `local_database/docker-compose.yml`.
 
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