Merge remote-tracking branch 'origin/MC-35208' into 2.3.6-develop-pr140

Author: StasKozar

app/code/Magento/Store/etc/config.xml

@@ -133,6 +133,7 @@
                     <phpt>phpt</phpt>
                     <pht>pht</pht>
                     <svg>svg</svg>
+                    <xml>xml</xml>
                 </protected_extensions>
                 <public_files_valid_paths>
                     <protected>