[DevTools] Fix: use correct enum for issue creation UMA tracking

Introduced in https://crrev.com/c/2574985

Bug: 1072335

Change-Id: I57a42b17dafa55c4f7b4c12bae32f72d7be12321
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2623945Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Wolfgang Beyer <wolfi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842912}

tools/metrics/histograms/histograms_xml/dev/histograms.xml

@@ -205,7 +205,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   </summary>
 </histogram>
 
-<histogram name="DevTools.IssueCreated" enum="DevToolsIssuesPanelOpenedFrom"
+<histogram name="DevTools.IssueCreated" enum="DevToolsIssueCreated"
     expires_after="2021-10-31">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>