[DOCS] Update sharepoint-online connector perms (elastic#116641)

(cherry picked from commit a71c132)

docs/reference/connector/docs/connectors-sharepoint-online.asciidoc

@@ -87,14 +87,16 @@ Select an expiration date. (At this expiration date, you will need to generate a
 +
 ```
 Graph API
-- Sites.Read.All
+- Sites.Selected
 - Files.Read.All
 - Group.Read.All
 - User.Read.All
 
 Sharepoint
-- Sites.Read.All
+- Sites.Selected
 ```
+NOTE: If the `Comma-separated list of sites` configuration is set to `*` or if a user enables the toggle button `Enumerate all sites`, the connector requires `Sites.Read.All` permission.
+
 * **Grant admin consent**, using the `Grant Admin Consent` link from the permissions screen.
 * Save the tenant name (i.e. Domain name) of Azure platform.
 
@@ -138,7 +140,7 @@ Refer to https://learn.microsoft.com/en-us/sharepoint/dev/general-development/ho
 
 Here's a summary of why we use these Graph API permissions:
 
-* *Sites.Read.All* is used to fetch the sites and their metadata
+* *Sites.Selected* is used to fetch the sites and their metadata
 * *Files.Read.All* is used to fetch Site Drives and files in these drives
 * *Groups.Read.All* is used to fetch groups for document-level permissions
 * *User.Read.All* is used to fetch user information for document-level permissions
@@ -546,14 +548,16 @@ Select an expiration date. (At this expiration date, you will need to generate a
 +
 ```
 Graph API
-- Sites.Read.All
+- Sites.Selected
 - Files.Read.All
 - Group.Read.All
 - User.Read.All
 
 Sharepoint
-- Sites.Read.All
+- Sites.Selected
 ```
+NOTE: If the `Comma-separated list of sites` configuration is set to `*` or if a user enables the toggle button `Enumerate all sites`, the connector requires `Sites.Read.All` permission.
+
 * **Grant admin consent**, using the `Grant Admin Consent` link from the permissions screen.
 * Save the tenant name (i.e. Domain name) of Azure platform.
 
@@ -597,7 +601,7 @@ Refer to https://learn.microsoft.com/en-us/sharepoint/dev/general-development/ho
 
 Here's a summary of why we use these Graph API permissions:
 
-* *Sites.Read.All* is used to fetch the sites and their metadata
+* *Sites.Selected* is used to fetch the sites and their metadata
 * *Files.Read.All* is used to fetch Site Drives and files in these drives
 * *Groups.Read.All* is used to fetch groups for document-level permissions
 * *User.Read.All* is used to fetch user information for document-level permissions