[v8-test262-automation] Updated curation log with latest revision sha's from...

[v8-test262-automation] Updated curation log with latest revision sha's from export and changed files.
    sourceRevisionAtLastExport: d540724b targetRevisionAtLastExport: 713af1bb

implementation-contributed/curation_logs/v8.json

 {
-  "sourceRevisionAtLastExport": "d540724b",
-  "targetRevisionAtLastExport": "713af1bb14",
+  "sourceRevisionAtLastExport": "f4a586f0",
+  "targetRevisionAtLastExport": "43cce788bd",
   "curatedFiles": {}
 }
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