Fix path to ISSUE_TEMPLATE in labels config

Author: necolas

.github/labels-config.yml

@@ -2,7 +2,7 @@
 
 "needs: issue template":
   comment: >
-    <strong>:warning: This issue is missing required fields</strong>. To avoid this issue being closed, please provide the required information as described in the <a href="https://github.com/necolas/react-native-web/blob/master/.github/ISSUE_TEMPLATE/bug.md">ISSUE TEMPLATE</a>.
+    <strong>:warning: This issue is missing required fields</strong>. To avoid this issue being closed, please provide the required information as described in the <a href="https://github.com/necolas/react-native-web/blob/master/.github/ISSUE_TEMPLATE/bug.yml">ISSUE TEMPLATE</a>.
 
 "resolution: no response":
   comment: >