Update issue configuration

Use Bluesky instead of Twitter.

Author: martincostello

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: true
 contact_links:
   - name: Contact me
-    url: https://twitter.com/martin_costello
-    about: You can also contact me on Twitter.
+    url: https://martincostello.com/bluesky
+    about: You can also contact me on Bluesky.