Update perfherder data schema for visual metrics. (#16837)

taskcluster/docker/visual-metrics/performance-artifact-schema.json

@@ -7,6 +7,7 @@
                     "enum": [
                         "firefox",
                         "chrome",
+                        "chrome-m",
                         "chromium",
                         "fennec",
                         "geckoview",
@@ -122,7 +123,7 @@
                     "description": "Similar to extraOptions, except it does not break existing performance data series",
                     "items": {
                         "type": "string",
-                        "pattern": "^[a-zA-Z0-9]{1,24}$"
+                        "pattern": "^[a-zA-Z0-9-]{1,24}$"
                     },
                     "uniqueItems": true,
                     "maxItems": 14