DEV: make all "comments" real md comments in the PR template (#8708)

# Description
i sometimes see some sections of the PR template being left untouched by
contributors 🤔
this is not a big deal at all, but i thought we could hide them in the
final PR by making the italic hints real markdown comments with the
`<!-- ... -->` syntax.

this has the effect of 
- still showing the guidelines to the contributor in the PR creation
window
- not show these guidelines in the visible PR body

> **Warning**
> limitations
> - this won't remove the comments from the squashed commit when the PR
lands 🤔
> - we might need to use a more structured template for this, like in
the [feature
requests](https://github.com/nushell/nushell/issues/new?assignees=&labels=enhancement&template=feature_request.yml)
but i'm not sure this works with PR templates 😕

# User-Facing Changes
```
$nothing
```

# Tests + Formatting
```
$nothing
```

# After Submitting
```
$nothing
```
This commit is contained in:
Antoine Stevan 2023-04-12 19:30:12 +02:00 committed by GitHub
parent 8ee52b6ee1
commit b3d6896977
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@ -1,16 +1,16 @@
# Description # Description
<!--
Thank you for improving Nushell. Please, check our [contributing guide](../CONTRIBUTING.md) and talk to the core team before making major changes.
_(Thank you for improving Nushell. Please, check our [contributing guide](../CONTRIBUTING.md) and talk to the core team before making major changes.)_ Description of your pull request goes here. **Provide examples and/or screenshots** if your changes affect the user experience.
-->
_(Description of your pull request goes here. **Provide examples and/or screenshots** if your changes affect the user experience.)_
# User-Facing Changes # User-Facing Changes
<!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. -->
_(List of all changes that impact the user experience here. This helps us keep track of breaking changes.)_
# Tests + Formatting # Tests + Formatting
<!--
Don't forget to add tests that cover your changes. Don't forget to add tests that cover your changes.
Make sure you've run and fixed any issues with these commands: Make sure you've run and fixed any issues with these commands:
@ -26,7 +26,7 @@ Make sure you've run and fixed any issues with these commands:
> use toolkit.nu # or use an `env_change` hook to activate it automatically > use toolkit.nu # or use an `env_change` hook to activate it automatically
> toolkit check pr > toolkit check pr
> ``` > ```
-->
# After Submitting # After Submitting
<!-- If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. -->
If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date.