Use exact runtime for non-servicing builds of Blazor DevServer (#56278)

Author: halter73

src/Components/WebAssembly/DevServer/src/Microsoft.AspNetCore.Components.WebAssembly.DevServer.csproj

@@ -36,8 +36,11 @@
 
   <Target Name="_CreateRuntimeConfig" BeforeTargets="CoreBuild">
     <PropertyGroup>
-      <_RuntimeConfigProperties>
-        AspNetCoreMajorMinorVersion=$(AspNetCoreMajorMinorVersion);
+      <_RuntimeConfigProperties Condition="'$(IsServicingBuild)' == 'true'">
+        FrameworkVersion=$(AspNetCoreMajorMinorVersion).0;
+      </_RuntimeConfigProperties>
+      <_RuntimeConfigProperties Condition="'$(IsServicingBuild)' != 'true'">
+        FrameworkVersion=$(SharedFxVersion);
       </_RuntimeConfigProperties>
 
       <_RuntimeConfigPath>$(OutputPath)blazor-devserver.runtimeconfig.json</_RuntimeConfigPath>

src/Components/WebAssembly/DevServer/src/blazor-devserver.runtimeconfig.json.in

@@ -3,7 +3,7 @@
     "tfm": "net9.0",
     "framework": {
       "name": "Microsoft.AspNetCore.App",
-      "version": "${AspNetCoreMajorMinorVersion}.0"
+      "version": "${FrameworkVersion}"
     },
     "rollForwardOnNoCandidateFx": 2
   }