Issue template improvements (#2069)

This fixes a typo in the issue templates and comments out some instruction to make them invisible in the issue.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -9,11 +9,14 @@ assignees: ''
 
 **Information:**
 - Prism version: [e.g. 1.14, latest from the download page, etc.]
+- Plugins: [a list of plugins you are using or 'none']
 - Environment: [e.g. Browser, Node, Webpack]
 
+<!--
 Does the latest version of Prism from the [download page](https://prismjs.com/download.html) also have this issue?
 
 If you're using Prism with Node or Webpack, please also see the [usage section](https://prismjs.com/index.html#basic-usage).
+-->
 
 **Description**
 A clear and concise description of what the bug is and how to reproduce it.

.github/ISSUE_TEMPLATE/highlighting-bug-report.md

@@ -12,7 +12,10 @@ assignees: ''
 - Language: [e.g. C++, JavaScript, YAML, etc.]
 - Plugins: [a list of plugins you are using or 'none']
 
-Does the problem still occur in the latest version of Prism? You can check using the [test page](https://prismjs.com/test.html) or get the latest version at the [download page](https://prismjs.com/download.html).
+<!--
+Does the problem still occur in the latest version of Prism?
+You can check using the [test page](https://prismjs.com/test.html) or get the latest version at the [download page](https://prismjs.com/download.html).
+-->
 
 **Description**
 A clear and concise description of what is being highlighted incorrectly and how it should be highlighted instead. Add screenshots to illustrate the problem.

.github/ISSUE_TEMPLATE/new-language-request.md

@@ -2,7 +2,7 @@
 name: New language request
 about: Suggest a new language Prism should support.
 title: ''
-labels: language-definitions, new langauge
+labels: language-definitions, new language
 assignees: ''
 
 ---