Update upload-pages-artifact to v3 (#3423) (#3513)

* Update upload-pages-artifact to v3

* Empty commit

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Co-authored-by: Ashwin Srinath <3190405+shwina@users.noreply.github.com>
Co-authored-by: Ashwin Srinath <shwina@users.noreply.github.com>

Author: bernhardmgruber

.github/actions/docs-build/action.yml

@@ -54,4 +54,4 @@ runs:
     # Upload docs as pages artifacts
     - name: Upload artifact
       if: ${{ inputs.upload_pages_artifact == 'true' }}
-      uses: actions/upload-pages-artifact@v2
+      uses: actions/upload-pages-artifact@v3