Update HAFNIUMUmServiceSuspiciousFile.yaml

removing the trailing dot from the "name" field

Detections/MultipleDataSources/HAFNIUMUmServiceSuspiciousFile.yaml

@@ -1,5 +1,5 @@
 id: 7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e
-name: HAFNIUM UM Service writing suspicious file.
+name: HAFNIUM UM Service writing suspicious file
 description: |
   'This query looks for the Exchange server UM process writing suspicious files that may be indicative of webshells.
   Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
@@ -52,4 +52,4 @@ entityMappings:
   - entityType: IP
     fieldMappings:
       - identifier: Address
-        columnName: IPCustomEntity
+        columnName: IPCustomEntity