docs: update firestore query api link and collection reference link(#3408)

docs/compat/firestore/collections.md

@@ -7,7 +7,7 @@ Each *document* contains a set of key-value pairs. Cloud Firestore is optimized
 
 ## Using `AngularFirestoreCollection`
 
-The `AngularFirestoreCollection` service is a wrapper around the native Firestore SDK's [`CollectionReference`](https://firebase.google.com/docs/reference/js/firebase.firestore.CollectionReference) and [`Query`](https://firebase.google.com/docs/reference/js/firebase.firestore.Query) types. It is a generic service that provides you with a strongly typed set of methods for manipulating and streaming data. This service is designed for use as an `@Injectable()`.
+The `AngularFirestoreCollection` service is a wrapper around the native Firestore SDK's [`CollectionReference`](https://firebase.google.com/docs/reference/js/v8/firebase.firestore.CollectionReference) and [`Query`](https://firebase.google.com/docs/reference/js/v8/firebase.firestore.Query) types. It is a generic service that provides you with a strongly typed set of methods for manipulating and streaming data. This service is designed for use as an `@Injectable()`.
 
 ```ts
 import { Component } from '@angular/core';

docs/compat/firestore/querying-collections.md

@@ -1,13 +1,13 @@
 # 4. Querying Collections in AngularFirestore
 
 > Firestore has [powerful querying syntax](https://firebase.google.com/docs/firestore/query-data/queries) and the `AngularFirestoreCollection` provides a thin wrapper around it. This keeps you from having to learn two query syntax systems.
-If you know the [Firestore query API](https://firebase.google.com/docs/reference/js/firebase.firestore.Query) then you know how to query in AngularFirestore.
+If you know the [Firestore query API](https://firebase.google.com/docs/reference/js/v8/firebase.firestore.Query) then you know how to query in AngularFirestore.
 
 > **NOTE**: [AngularFire has a new tree-shakable API](../../../README.md#developer-guide), you're looking at the documentation for the compatability version of the library. [See the v7 upgrade guide for more information on this change.](../../version-7-upgrade.md).
 
 ## Creating a query with primitive/scalar values
 
-Queries are created by building on the [`firebase.firestore.CollectionReference`](https://firebase.google.com/docs/reference/js/firebase.firestore.CollectionReference).
+Queries are created by building on the [`firebase.firestore.CollectionReference`](https://firebase.google.com/docs/reference/js/v8/firebase.firestore.CollectionReference).
 
 ```ts
 afs.collection('items', ref => ref.where('size', '==', 'large'))

site/src/firestore/collections.md

@@ -12,7 +12,7 @@ Each *document* contains a set of key-value pairs. Cloud Firestore is optimized
 
 ## Using `AngularFirestoreCollection`
 
-The `AngularFirestoreCollection` service is a wrapper around the native Firestore SDK's [`CollectionReference`](https://firebase.google.com/docs/reference/js/firebase.firestore.CollectionReference) and [`Query`](https://firebase.google.com/docs/reference/js/firebase.firestore.Query) types. It is a generic service that provides you with a strongly typed set of methods for manipulating and streaming data. This service is designed for use as an `@Injectable()`.
+The `AngularFirestoreCollection` service is a wrapper around the native Firestore SDK's [`CollectionReference`](https://firebase.google.com/docs/reference/js/v8/firebase.firestore.CollectionReference) and [`Query`](hhttps://firebase.google.com/docs/reference/js/v8/firebase.firestore.Query) types. It is a generic service that provides you with a strongly typed set of methods for manipulating and streaming data. This service is designed for use as an `@Injectable()`.
 
 ```ts
 import { Component } from '@angular/core';