improve issue template (#3262)

Author: HackbrettXXX

Diff for: ISSUE_TEMPLATE.md

@@ -1,10 +1,12 @@
 Feature requests, bug reports etc. are very welcome as issues. But questions are directed to stackoverflow with the tag `jspdf`.
 
-If you are facing issues with utf-8 characters, please refer to [#2677](https://github.com/MrRio/jsPDF/issues/2677).
+If you are facing issues with garbled Unicode characters, please refer to [#2677](https://github.com/MrRio/jsPDF/issues/2677).
 
-Note that bug reports should follow these guidelines:
+Note that new issues should follow these guidelines. Otherwise, the issue will be closed without a comment and tagged with the "Needs Information" label.
 
-1. A bug should be reported as an [mcve](https://stackoverflow.com/help/mcve)
-2. Make sure code is properly indented and [formatted](https://help.github.com/articles/basic-writing-and-formatting-syntax/#quoting-code) (Use ``` around code blocks)
-3. Provide a runnable example.
-4. Try to make sure and show in your issue that the issue is actually related to jspdf and not your framework of choice your setup.
+1. A bug should be reported as an [mcve](https://stackoverflow.com/help/mcve).
+2. Make sure code is properly indented and [formatted](https://help.github.com/articles/basic-writing-and-formatting-syntax/#quoting-code) (Use ``` around code blocks).
+3. Provide a runnable example. Optimally, a link to an example that runs directly in the browser (JSFiddle, CodePen, etc.). Please don't share framework-specific code such as React components, unless strictly necessary to reproduce the issue. Try to isolate the code as much as possible and use only plain JS/HTML/CSS.
+4. Try to make sure and show in your issue that the issue is actually related to jspdf and not your framework of choice or your setup.
+5. Read and follow the [contribution guidelines](https://github.com/MrRio/jsPDF/blob/master/CONTRIBUTING.md#reporting-bugs).
+6. To make sure you have read this, delete this template and start the issue description with "I have read and understood the contribution guidelines.".