Tweak Trigger: labels (#42452)

Two changes:

1. **Observe the `Foo: Bar` pattern.** Use the `aliases` feature to
[rename](https://github.com/Financial-Times/github-label-sync#label-config-file).
"For example, given the following config, GitHub Label Sync will look
for labels on GitHub named either 'feature' or 'enhancement' then
_update_ them to match the newer config rather than deleting them."

2. **Standardize
[**colors**](https://storybook.sentry.dev/?path=/story/core-colors--page).**
I recently [introduced](#42447)
a `Sync: Jira` label, which seems loosely related to `Trigger: `. I
propose using the same color for both types.

---------

Co-authored-by: Evan Purkhiser <[email protected]>

Author: chadwhitacre

.github/labels.yml

@@ -8,11 +8,12 @@
 # Read more here: https://github.com/Financial-Times/github-label-sync#label-config-file
 
 # Getsentry workflow control
-- name: trigger-getsentry-external
-  color: '3E5E06'
+- name: 'Trigger: getsentry tests'
+  aliases: ['trigger-getsentry-external']
+  color: 'A0CABD'
   description: 'once code is reviewed: apply label to PR to trigger getsentry tests'
 - name: 'Trigger: Revert'
-  color: '3E5E06'
+  color: 'A0CABD'
   description: 'add to a merged PR to revert it (skips CI)'
 - name: 'Trigger: Visual Snapshot'
   color: '3E5E06'

.github/workflows/getsentry-dispatch.yml

@@ -19,7 +19,7 @@ permissions:
 
 jobs:
   dispatch:
-    if: github.event.action != 'labeled' || github.event.label.name == 'trigger-getsentry-external'
+    if: "github.event.action != 'labeled' || github.event.label.name == 'Trigger: getsentry tests'"
     name: getsentry dispatch
     runs-on: ubuntu-20.04
     steps:

.github/workflows/scripts/getsentry-dispatch-setup

@@ -4,7 +4,7 @@ import json
 import os
 import urllib.request
 
-LABEL = "trigger-getsentry-external"
+LABEL = "Trigger: getsentry tests"
 
 
 def _has_write(repo_id: int, username: str, *, token: str) -> bool: