GC: Restore: SharePoint add case for Page Category in Workflow. (#2114)

## Description
Fix to allow selectors to include `SharePoint.Pages` during backup without causing backup workflow to fail. 
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## Does this PR need a docs update or release note?
- [x] ⛔ No 

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [x] 🐛 Bugfix


## Issue(s)

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*closes  #2113<issue>

## Test Plan

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- [x] 💪 Manual

src/internal/connector/sharepoint/restore.go

@@ -76,6 +76,12 @@ func RestoreCollections(
 				deets,
 				errUpdater,
 			)
+		case path.PagesCategory:
+			errorMessage := fmt.Sprintf("restore of %s not supported", dc.FullPath().Category())
+			logger.Ctx(ctx).Error(errorMessage)
+
+			return nil, errors.New(errorMessage)
+
 		default:
 			return nil, errors.Errorf("category %s not supported", dc.FullPath().Category())
 		}