Expand "how to fix violations" in SA0001.md

Add instructions how to fix SA0001 violation by adding GenerateDocumentationFile property

Author: AmadeusW

documentation/SA0001.md

@@ -33,7 +33,7 @@ errors over time.
 
 ## How to fix violations
 
-To fix a violation of this rule, enable the XML documentation file as part of the project output.
+To fix a violation of this rule, enable the XML documentation file as part of the project output by adding `<GenerateDocumentationFile>true</GenerateDocumentationFile>` to your project file.
 
 **Note:** In some cases, enabling XML documentation output will produce a large number of warnings CS1573, CS1591,
 and/or CS1712 to be reported. To improve the ability of teams to resolve SA0001 before CS1573, CS1591, and CS1712,