fix: specify encoding for file with emoji in it so it loads on windows (

#8873)

<!-- Clearly explain the need for these changes: -->

On windows this file load kept crashing stuff on startup so I specified
the encoding

### Changes 🏗️

<!-- Concisely describe all of the changes made in this pull request:
-->

### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] Run the app!

autogpt_platform/backend/backend/blocks/github/triggers.py

@@ -111,7 +111,9 @@ class Output(GitHubTriggerBase.Output):
     def __init__(self):
         from backend.integrations.webhooks.github import GithubWebhookType
 
-        example_payload = json.loads(self.EXAMPLE_PAYLOAD_FILE.read_text())
+        example_payload = json.loads(
+            self.EXAMPLE_PAYLOAD_FILE.read_text(encoding="utf-8")
+        )
 
         super().__init__(
             id="6c60ec01-8128-419e-988f-96a063ee2fea",