chore: bump version

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup Condition="'$(VisualStudioVersion)' == '17.0'">
-    <Version>9.12.0</Version>
+    <Version>9.12.1-preview-01</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(VisualStudioVersion)' == '18.0'">