Bug 1436039 - Increase max time on Debugger's source load telemetry;r=jdescottes,liuche,datareview=liuche

MozReview-Commit-ID: 1fuTv4fPn3B

--HG--
extra : rebase_source : 154712263b8508a92de95c1b62b0c7299f019995

toolkit/components/telemetry/Histograms.json

@@ -8492,10 +8492,10 @@
   "DEVTOOLS_DEBUGGER_LOAD_SOURCE_MS": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["dev-developer-tools@lists.mozilla.org", "hkirschner@mozilla.com"],
-    "bug_numbers": [1429047],
+    "bug_numbers": [1429047, 1436039],
     "expires_in_version": "66",
     "kind": "exponential",
-    "high": 10000,
+    "high": 20000,
     "n_buckets": 100,
     "description": "The time (in milliseconds) that it took to load a source for the user."
   },