[meta] update issue template

.github/ISSUE_TEMPLATE/issue_template.md

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+---
+name: ISSUE_TEMPLATE
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!-- Thank you for being interested in nvm! Please help us by filling out the following form if you‘re having trouble. If you have a feature request, or some other question, please feel free to clear out the form. Thanks! -->
+
+#### Operating system and version:
+
+#### `nvm debug` output:
+<details>
+<!-- do not delete the following blank line -->
+
+```sh
+
+```
+</details>
+
+#### `nvm ls` output:
+<details>
+<!-- do not delete the following blank line -->
+
+```sh
+
+```
+</details>
+
+#### How did you install `nvm`?
+<!-- (e.g. install script in readme, Homebrew) -->
+
+#### What steps did you perform?
+
+#### What happened?
+
+#### What did you expect to happen?
+
+#### Is there anything in any of your profile files that modifies the `PATH`?
+<!--  (e.g. `.bashrc`, `.bash_profile`, `.zshrc`, etc) -->
+
+<!-- Please remove the following section if it does not apply to you -->
+#### If you are having installation issues, or getting "N/A", what does `curl -I --compressed -v https://nodejs.org/dist/` print out?
+<details>
+<!-- do not delete the following blank line -->
+
+```sh
+
+```
+</details>