Update issue templates

Author: agentmilindu

.github/ISSUE_TEMPLATE/new-installer-script-request.md

@@ -7,9 +7,20 @@ assignees: agentmilindu
 
 ---
 
-# About the tool
+## About the tool
 <!--- The better you describe it, the more the community would love to see an installer script for it in this repo -->
 
-# How the "cURL and bash" command be
+## How the "cURL & bash" command be
 <!--- eg: `curl https://installer.to/dunner | bash`  -->
-`curl https://installer.to/anytoolname | bash`
+```
+curl https://installer.to/anytoolname | bash
+```
+## Checklist
+- [ ] I checked the Issues list and I'm sure I'm not duplicating an existing request
+- [ ] I checked the Pull Request list and I'm sure I'm not proposing for a tool that is about to get added
+
+----
+
+I request the community to consider my proposal and cast your votes by commenting,
+* `+1` if you like to see an installer script for this tool in this repo
+* `-1` if you do not like to see an installer script for this tool in this repo