fix: update more /docs/references links

Signed-off-by: aramissennyeydd <aramis.sennyey@doordash.com>

docs/architecture-decisions/adr013-use-node-fetch.md

@@ -32,7 +32,7 @@ const users = await response.json();
 ```
 
 Frontend plugins and packages should prefer to use the
-[`fetchApiRef`](https://backstage.io/docs/reference/core-plugin-api.fetchapiref).
+[`fetchApiRef`](https://backstage.io/api/stable/variables/_backstage_core-plugin-api.index.fetchApiRef.html).
 It uses `cross-fetch` internally. Example:
 
 ```ts

docs/architecture-decisions/adr014-use-fetch.md

@@ -33,7 +33,7 @@ const users = await response.json();
 ```
 
 Frontend plugins and packages should prefer to use the
-[`fetchApiRef`](https://backstage.io/docs/reference/core-plugin-api.fetchapiref).
+[`fetchApiRef`](https://backstage.io/api/stable/variables/_backstage_core-plugin-api.index.fetchApiRef.html).
 
 ```ts
 import { useApi } from '@backstage/core-plugin-api';