back off version changes (dotnet#10473)

Back off part of dotnet#10422 because version numbers are hard and if we do need to service this, we'll have to pull in more substantial changes.

Author: brettfo

eng/Versions.props

@@ -14,7 +14,7 @@
     <PreReleaseVersionLabel>beta</PreReleaseVersionLabel>
     <FSMajorVersion>5</FSMajorVersion>
     <FSMinorVersion>0</FSMinorVersion>
-    <FSBuildVersion>1</FSBuildVersion>
+    <FSBuildVersion>0</FSBuildVersion>
     <FSRevisionVersion>0</FSRevisionVersion>
     <FSLanguageVersion>$(FSMajorVersion).$(FSMinorVersion)</FSLanguageVersion>
     <FSLanguageReleaseNotesVersion>$(FSMajorVersion)-$(FSMinorVersion)</FSLanguageReleaseNotesVersion>