autofix: fixes from CI

Author: benjie

.cachedValidUrls.json

@@ -68,6 +68,7 @@
   "https://flow.org/",
   "https://github.com/EmperorRXF/postgraphile-plugin-atomic-mutations",
   "https://github.com/GoogleCloudPlatform/nodejs-docs-samples/tree/master/appengine/hello-world/flexible",
+  "https://github.com/RedShift1/postgraphile-plugin-timestamp-format",
   "https://github.com/RoadRunnerEngineering/postgraphile-plugin-custom-filter",
   "https://github.com/auth0/express-jwt",
   "https://github.com/auth0/node-jsonwebtoken",

src/pages/postgraphile/community-plugins.md

@@ -79,8 +79,8 @@ Schema extension plugins for PostGraphile:
 - [postgraphile-remove-foreign-key-fields-plugin](https://github.com/jarvisuser90/postgraphile-remove-foreign-key-fields-plugin) -
   Removes all foreign key fields from the GraphQL schema while still allowing
   foreign relationships to be created.
-- [postgraphile-plugin-timestamp-format](https://github.com/RedShift1/postgraphile-plugin-timestamp-format) - Format timestamps
-  with PostgreSQL's to_char function. Supports timezones too
+- [postgraphile-plugin-timestamp-format](https://github.com/RedShift1/postgraphile-plugin-timestamp-format) -
+  Format timestamps with PostgreSQL's to_char function. Supports timezones too
 
 Examples of using these plugins: