Update MicrosoftBuildVersion to 17.12.50 (#6866)

Author: Nigusu-Allehu

Directory.Packages.props

@@ -13,9 +13,9 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <MicrosoftBuildVersion Condition="'$(MicrosoftBuildVersion)' == '' and '$(DotNetBuildSourceOnly)' == 'true'">17.12.36</MicrosoftBuildVersion>
+    <MicrosoftBuildVersion Condition="'$(MicrosoftBuildVersion)' == '' and '$(DotNetBuildSourceOnly)' == 'true'">17.12.50</MicrosoftBuildVersion>
     <!-- Read docs/updating-packages.md before updating MSBuild's version -->
-    <MicrosoftBuildVersion Condition="'$(MicrosoftBuildVersion)' == ''">17.11.31</MicrosoftBuildVersion>
+    <MicrosoftBuildVersion Condition="'$(MicrosoftBuildVersion)' == ''">17.11.48</MicrosoftBuildVersion>
   </PropertyGroup>
 
     <!-- Overridden by source build to ensure the same version is used across products, do not remove these properties -->