[wasm] Bump sdk used for testing workloads to 6.0.100-rtm.21480.21

Author: radical

eng/Versions.props

@@ -163,7 +163,7 @@
     <SQLitePCLRawbundle_greenVersion>2.0.4</SQLitePCLRawbundle_greenVersion>
     <MoqVersion>4.12.0</MoqVersion>
     <FsCheckVersion>2.14.3</FsCheckVersion>
-    <SdkVersionForWorkloadTesting>6.0.100-rc.2.21474.31</SdkVersionForWorkloadTesting>
+    <SdkVersionForWorkloadTesting>6.0.100-rtm.21480.21</SdkVersionForWorkloadTesting>
     <CompilerPlatformTestingVersion>1.1.1-beta1.21467.5</CompilerPlatformTestingVersion>
     <!-- Docs -->
     <MicrosoftPrivateIntellisenseVersion>6.0.0-preview-20211019.1</MicrosoftPrivateIntellisenseVersion>