Updated TOC

Adding new doc to TOC

Author: kyracatwork

docs/toc.yml

@@ -2083,6 +2083,8 @@
     href: apis/sharepoint-rest-graph.md
   - name: Application Lifecycle Management (ALM) APIs
     href: apis/alm-api-for-spfx-add-ins.md
+  - name: CSOM methods for applying retention labels
+    href: apis/CSOM-methods-for-applying-retention-labels.md    
   - name: SharePoint Add-in Management APIs
     href: apis/addin-management-apis.md
   - name: Microsoft 365 Copy and Move API