.github: update issue templates

[skip ci]

Author: tulir

.github/ISSUE_TEMPLATE/bug.md

@@ -1,14 +1,16 @@
 ---
 name: Bug report
 about: If something is definitely wrong in the bridge (rather than just a setup issue),
-  file a bug report. Remember to include relevant logs.
-labels: bug
+  file a bug report. Remember to include relevant logs. Asking in the Matrix room first
+  is strongly recommended.
+type: Bug
 
 ---
 
 <!--
 Remember to include relevant logs, the bridge version and any other details.
 
-If you aren't sure what's needed, ask in the Matrix room rather than opening an
-incomplete issue. Issues with insufficient detail will likely just be ignored.
+It's always best to ask in the Matrix room first, especially if you aren't sure
+what details are needed. Issues with insufficient detail will likely just be
+ignored or closed immediately.
 -->

.github/ISSUE_TEMPLATE/enhancement.md

@@ -1,6 +1,6 @@
 ---
 name: Enhancement request
 about: Submit a feature request or other suggestion
-labels: enhancement
+type: Feature
 
 ---