qoute labels in issue forms example

Issue labels on Github often contain emoji and emoji in labels starts and end with colon which breaks YAML if not quoted. Therefore, quote the labels in the examples to make copy-pasting easier and the example less error-prone to users not experienced with YAML.

data/reusables/community/issue-forms-sample.md

@@ -2,7 +2,7 @@
 name: Bug Report
 description: File a bug report
 title: "[Bug]: "
-labels: [bug, triage]
+labels: ["bug", "triage"]
 assignees:
   - octocat
 body: