Update contributions-only.md

Author: alecthomas

.github/ISSUE_TEMPLATE/contributions-only.md

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 assignees: ''
 
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+<!--
 # CONTRIBUTIONS ONLY
 
 **What does this mean?** I do not have time to fix issues myself. The only way fixes or new features will be added is by people submitting PRs.
 
 **Current status.** Voluptuous is largely feature stable. There hasn't been a need to add new features in a while, but there are some bugs that should be fixed.
 
 **Why?** I no longer use Voluptuous personally (in fact I no longer regularly write Python code). Rather than leave the project in a limbo of people filing issues and wondering why they're note being worked on, I believe this notice will more clearly set expectations.
+-->