DOCSP-9534: [Guides] change to (#151)

Author: steveren

source/cloud/atlas-search-stitch-sample-app.txt

@@ -18,7 +18,7 @@
      - Spin up an Atlas cluster and load the sample dataset
      - Create an Atlas Search index on the ``movies`` collection
      - Write an :manual:`aggregation pipeline </aggregation>` with
-       the :atlas:`$searchBeta </reference/atlas-search/query-syntax>`
+       the :atlas:`$search </reference/atlas-search/query-syntax>`
        operator
      - Create a :stitch:`Stitch </>` application to access your data
      - Create a web-based UI for your application

source/includes/steps-fts-sample-app.yaml

@@ -55,7 +55,7 @@ content: |
 title: Write an aggregation pipeline query. (Optional)
 ref: write-agg
 content: |
-  Full-text search queries use the :atlas:`$searchBeta
+  Full-text search queries use the :atlas:`$search
   </reference/atlas-search/query-syntax>` aggregation pipeline
   stage. If you'd like to learn more about constructing a full-text
   search query, proceed with the following steps. If you'd rather get
@@ -74,15 +74,15 @@ content: |
 
   #. Select the :guilabel:`Aggregations` tab in the top navigation.
 
-  #. Select :guilabel:`$searchBeta` in the dropdown menu for the first
+  #. Select :guilabel:`$search` in the dropdown menu for the first
      aggregation stage.
 
   #. We'll use the :atlas:`search </reference/atlas-search/search/>`
      and :atlas:`highlight </reference/atlas-search/highlighting/>`
      operators to look for the search terms ``vampires and werewolves``
      in the ``fullplot`` field of our ``movies`` collection.
 
-     Enter the following text in the ``$searchBeta`` stage of your
+     Enter the following text in the ``$search`` stage of your
      pipeline:
 
       .. code-block:: none
@@ -192,7 +192,7 @@ content: |
           let arg = payload.query.arg;
           return collection.aggregate([
           	  { 
-                $searchBeta: {
+                $search: {
                   search: {
                      query: arg,
                      path:'fullplot',