use sentence case in landing page and TOC

Author: meaghanlewis

articles/planetary-computer/TOC.yml

@@ -25,13 +25,13 @@
     href: api-tutorial.md
   - name: Delete a Geocatalog resource
     href: delete-geocatalog-resource.md
-- name: Create a STAC Collection
+- name: Create a STAC collection
   items:
   - name: Create a STAC collection (Web Interface)
     href: create-collection-web-interface.md
   - name: Create a STAC collection (API)
     href: create-stac-collection.md
-- name: Ingest Data
+- name: Ingest data
   items:
   - name: Ingestion overview
     href: ingestion-overview.md
@@ -45,11 +45,11 @@
     href: ingest-via-web-interface.md
   - name: Create a STAC item
     href: create-stac-item.md
-  - name: Add a STAC Item to a collection
+  - name: Add a STAC item to a collection
     href: add-stac-item-to-collection.md
   - name: Bulk ingest data
     href: bulk-ingestion-api.md
-- name: Configure Collections for Visualization
+- name: Configure collections for visualization
   items:
   - name: Collection configuration overview
     href: collection-configuration-concept.md
@@ -81,7 +81,7 @@
     href: azure-batch.md
   - name: API Reference
     href: /rest/api/planetarycomputer
-- name: Working with Data Cubes
+- name: Working with data cubes
   items:
   - name: Data cube overview
     href: data-cube-overview.md

articles/planetary-computer/index.yml

@@ -32,11 +32,11 @@ landingContent:
         links:
           - text: STAC overview
             url: stac-overview.md
-          - text: Supported Data Types
+          - text: Supported data types
             url: supported-data-types.md
 
   # Card
-  - title: Deploy & Setup
+  - title: Deploy & setup
     linkLists:
       - linkListType: get-started
         links:
@@ -57,7 +57,7 @@ landingContent:
 
 
   # Card
-  - title: Create a STAC Collection
+  - title: Create a STAC collection
     linkLists:
       - linkListType: quickstart
         links: