Merged PR 51725: 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.

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#### AI description  (iteration 1)
#### PR Classification
This pull request reverts the SHA value of the System.Text.Json dependency to the SHA from the released version.

#### PR Summary
The changes update the SHA for the System.Text.Json 8.0.6 dependency in `eng/Version.Details.xml` to ensure the project references the released version.
- `eng/Version.Details.xml`: Replaced the SHA value from "653dfdfd75c3e98989361b4154703d13649be4cb" with "ef853a71052646a42abf17e888ec6d9a69614ad9".
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: vseanreesermsft

eng/Version.Details.xml

@@ -43,7 +43,7 @@
     </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.NETCore.App.Ref" Version="8.0.19">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>