Bump prerelease version to 6 (dotnet#102589)

Author: carlossanlop

eng/Versions.props

@@ -11,7 +11,7 @@
     <PackageVersionNet7>7.0.19</PackageVersionNet7>
     <PackageVersionNet6>6.0.$([MSBuild]::Add($([System.Version]::Parse('$(PackageVersionNet8)').Build),25))</PackageVersionNet6>
     <PreReleaseVersionLabel>preview</PreReleaseVersionLabel>
-    <PreReleaseVersionIteration>5</PreReleaseVersionIteration>
+    <PreReleaseVersionIteration>6</PreReleaseVersionIteration>
     <!-- Enable to remove prerelease label. -->
     <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>