Bug 1734460 - Make these profiler docs refer to the Upload button (which no longer says Publish) correctly. r=canaltinova

Differential Revision: https://phabricator.services.mozilla.com/D127699

docs/performance/reporting_a_performance_problem.md

@@ -54,9 +54,9 @@ mouse to interact with the UI:
     it's a good sign. ![Jank markers appearing in the Perf.html profile analysis tool.](img/PerfDotHTMLRedLines.png)
 3.  The data will open in a new tab. Wait until the \"Symbolicating call
     stacks\" notification disappears before sharing the profile.
-4.  There will be a button in the top right labeled **Publish** which
+4.  There will be a button in the top right labeled **Upload Local Profile** which
     will allow you to upload this profile and once completed will write
-    out a link. Before uploading, the publish button asks you what data
+    out a link. Before uploading, the Upload button asks you what data
     you'd like to publish to our servers.
 5.  Note that while it's possible to strip profiles of potentially
     privacy sensitive information, the less information a profile