[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: a345e766 targetRevisionAtLastExport: d1fe93a7

implementation-contributed/curation_logs/v8.json

 {
-  "sourceRevisionAtLastExport": "a345e766",
-  "targetRevisionAtLastExport": "d1fe93a71",
+  "sourceRevisionAtLastExport": "69a502ce",
+  "targetRevisionAtLastExport": "67fc22e98",
   "curatedFiles": {}
 }
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