Merged PR 51799: Updated Version.Details.xml - Revert 8.0.6 system.text.json sha to released v...

Updated Version.Details.xml - Revert 8.0.6 system.text.json sha to released version.

Cherry-picked from commit `be70b90a`.

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#### AI description  (iteration 1)
#### PR Classification
Dependency update: This PR reverts the SHA for System.Text.Json v8.0.6 to the released version.

#### PR Summary
The pull request updates the dependency configuration to align with the production release.
- `eng/Version.Details.xml`: Reverts the System.Text.Json SHA from 653dfdfd75c3e98989361b4154703d13649be4cb to ef853a71052646a42abf17e888ec6d9a69614ad9.
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: vseanreesermsft

eng/Version.Details.xml

@@ -427,7 +427,7 @@
     </Dependency>
     <Dependency Name="System.Text.Json" Version="8.0.6">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
-      <Sha>653dfdfd75c3e98989361b4154703d13649be4cb</Sha>
+      <Sha>ef853a71052646a42abf17e888ec6d9a69614ad9</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>