[Release] Update URL to point to the new V8 wiki

R=machenbach@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1480323002

Cr-Commit-Position: refs/heads/master@{#32409}

tools/release/auto_roll.py

@@ -14,7 +14,7 @@ ROLL_SUMMARY = ("Summary of changes available at:\n"
 
 ISSUE_MSG = (
 """Please follow these instructions for assigning/CC'ing issues:
-https://code.google.com/p/v8-wiki/wiki/TriagingIssues
+https://github.com/v8/v8/wiki/Triaging%20issues
 
 Please close rolling in case of a roll revert:
 https://v8-roll.appspot.com/

tools/release/test_scripts.py

@@ -1009,7 +1009,7 @@ Summary of changes available at:
 https://chromium.googlesource.com/v8/v8/+log/last_rol..roll_hsh
 
 Please follow these instructions for assigning/CC'ing issues:
-https://code.google.com/p/v8-wiki/wiki/TriagingIssues
+https://github.com/v8/v8/wiki/Triaging%20issues
 
 Please close rolling in case of a roll revert:
 https://v8-roll.appspot.com/