doc: corrects number of datasource used by pkgsite frontend
TryBot-Result: kokoro
Run-TryBot: Dylan Le
Run-TryBot: Hyang-Ah Hana Kim
@@ -21,7 +21,7 @@ You can run the frontend locally like so:
- The `-dev` flag reloads templates on each page load and rebuilds JavaScript
assets when TypeScript source files change.
-The frontend can use one of three datasources:
+The frontend can use one of two datasources:
- Postgres database
- Proxy service
