[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: 3a79fe2363 targetRevisionAtLastExport: 8138074d

implementation-contributed/curation_logs/v8.json

 {
-  "sourceRevisionAtLastExport": "3a79fe2363",
-  "targetRevisionAtLastExport": "8138074de",
+  "sourceRevisionAtLastExport": "ceacdcd0",
+  "targetRevisionAtLastExport": "55d559e57",
   "curatedFiles": {}
 }
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