Merged PR 51784: Commit 3d4840db: Updated Version.Details.xml - Revert 8.0.6 system.text.json...

Commit 3d4840db: 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 a previous update to the System.Text.Json dependency in the dependency file.

#### PR Summary
The change updates the SHA for the System.Text.Json dependency in the Version.Details.xml file to undo the recent 8.0.6 update.
- `eng/Version.Details.xml`: Updated the SHA from 653dfdfd75c3e98989361b4154703d13649be4cb to ef853a71052646a42abf17e888ec6d9a69614ad9.
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: vseanreesermsft

eng/Version.Details.xml

@@ -257,7 +257,7 @@
     </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="System.Threading.AccessControl" Version="8.0.0">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>