Update implicit versions for October (#51341)

Author: marcpopMSFT

eng/Versions.props

@@ -38,8 +38,8 @@
     <VersionFeature60>36</VersionFeature60>
     <VersionFeature70>20</VersionFeature70>
     <!-- This version should be N-1 (ie the currently released version) in the preview branch but N-2 in main so that workloads stay behind the unreleased version -->
-    <VersionFeature80>$([MSBuild]::Add($(VersionFeature), 22))</VersionFeature80>
-    <VersionFeature90>$([MSBuild]::Add($(VersionFeature), 11))</VersionFeature90>
+    <VersionFeature80>21</VersionFeature80>
+    <VersionFeature90>10</VersionFeature90>
     <!-- Should be kept in sync with VersionFeature70. It should match the version of Microsoft.NET.ILLink.Tasks
          referenced by the same 7.0 SDK that references the 7.0.VersionFeature70 runtime pack. -->
     <_NET70ILLinkPackVersion>7.0.100-1.23211.1</_NET70ILLinkPackVersion>