[gtk] Reduce the header level in the bug template

[Emmanuele Bassi <ebassi src gnome org>]

commit 1e3d9e1293e2cada941e9108f9893dd2e48b6b76
Author: Emmanuele Bassi <ebassi gmail com>
Date:   Wed Mar 21 11:49:24 2018 +0000

    Reduce the header level in the bug template
    
    Make version and additional information headers use h2, like everything else.

 .gitlab/issue_templates/Bug.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/.gitlab/issue_templates/Bug.md b/.gitlab/issue_templates/Bug.md
index 84a05a4ea2..ebfb0c6279 100644
--- a/.gitlab/issue_templates/Bug.md
+++ b/.gitlab/issue_templates/Bug.md
@@ -21,7 +21,7 @@
   Please describe the expected outcome
 -->
 
-# Version information
+## Version information
 <!--
  - which version of GTK+ you are using
  - what operating system and version
@@ -29,11 +29,11 @@
  - if you built GTK+ yourself, the list of options used to configure the build
 -->
 
-# Additional information
+## Additional information
 <!--
  - If the bug was a crash, the exact text that was printed out
    when the crash occurred.
  - If the bug was a crash, attaching a stack trace obtained using
    GDB is appreciated; follow the instructions on the wiki:
    https://wiki.gnome.org/Community/GettingInTouch/Bugzilla/GettingTraces
--->
+-->
\ No newline at end of file