[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: 995333da targetRevisionAtLastExport: ccadd02f2b

implementation-contributed/curation_logs/v8.json

 {
-  "sourceRevisionAtLastExport": "995333da",
-  "targetRevisionAtLastExport": "ccadd02f2b",
+  "sourceRevisionAtLastExport": "89eb451c",
+  "targetRevisionAtLastExport": "7519e1b462",
   "curatedFiles": {}
 }
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