docs: git: templates: improve wording

Remove the comma so that the intention is more clear.

Author: shpaass

.github/ISSUE_TEMPLATE/feature_request.md

@@ -8,4 +8,4 @@ assignees: ''
 ---
 
 - A feature request is something that you would like to see in YAFC. 
-- Please keep in mind that unless you're a developer, or unless some other developer really wants that feature, the chances of implementing the feature are close to zero.
+- Please keep in mind that unless you're a developer or unless some other developer really wants that feature, the chances of implementing the feature are close to zero.