chore(issue templates): small tweaks + clear mention of support window (#35304)

Summary:
During the outage it become clear that we are not doing enough to communicate what the release support policy/window is. This is one of the tweaks I'm doing to help with that

## Changelog

<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://reactnative.dev/contributing/changelogs-in-pull-requests
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[Internal] [Changed] - small tweaks to issue templates + clear mention of support window

Pull Request resolved: https://github.com/facebook/react-native/pull/35304

Test Plan: N/A

Reviewed By: christophpurrer

Differential Revision: D41183435

Pulled By: cipolleschi

fbshipit-source-id: 32519c52616fb1903507fad291200eb959d451b4

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -10,15 +10,15 @@ body:
     id: description
     attributes:
       label: Description
-      description: Please provide a clear and concise description of what the bug is. Include screenshots if needed. Please test using the latest React Native release to make sure your issue has not already been fixed - https://reactnative.dev/docs/upgrading.html
+      description: Please provide a clear and concise description of what the bug is. Include screenshots if needed. Test using the [latest React Native release](https://github.com/facebook/react-native/releases/latest) to make sure your issue has not already been fixed.
     validations:
       required: true
   - type: input
     id: version
     attributes:
       label: Version
-      description: What react-native version does this appear on?
+      description: What react-native version does this appear on? Bear in mind that only issues on [supported versions](https://github.com/reactwg/react-native-releases#which-versions-are-currently-supported) will be looked into.
-      placeholder: ex. 0.66.0
+      placeholder: ex. 0.70.0
     validations:
       required: true
   - type: textarea
@@ -43,6 +43,6 @@ body:
         Please provide a Snack (https://snack.expo.dev/), a link to a repository on GitHub, or provide a minimal code example that reproduces the problem.
         You may provide a screenshot of the application if you think it is relevant to your bug report.
         Here are some tips for providing a minimal example: https://stackoverflow.com/help/mcve
-        Please note that a reproducer is mandatory. Issues without reproducer are more likely to stall and will be closed.
+        Please note that a reproducer is **mandatory**. Issues without reproducer are more likely to stall and will be closed.
     validations:
       required: true

.github/ISSUE_TEMPLATE/new_architecture_bug_report.yml

@@ -48,6 +48,6 @@ body:
         Please provide a Snack (https://snack.expo.dev/), a link to a repository on GitHub, or provide a minimal code example that reproduces the problem.
         You may provide a screenshot of the application if you think it is relevant to your bug report.
         Here are some tips for providing a minimal example: https://stackoverflow.com/help/mcve
-        Please note that a reproducer is mandatory. Issues without reproducer are more likely to stall and will be closed.
+        Please note that a reproducer is **mandatory**. Issues without reproducer are more likely to stall and will be closed.
     validations:
       required: true

.github/ISSUE_TEMPLATE/upgrade-regression-form.yml

@@ -5,7 +5,7 @@ body:
   - type: markdown
     attributes:
       value: |
-        Please use this form to file an issue if you have upgarded or are upgrading to [latest stable release](https://github.com/facebook/react-native/releases/latest) and have experienced a regression (something that used to work in previous version).
+        Please use this form to file an issue if you have upgraded or are upgrading to [latest stable release](https://github.com/facebook/react-native/releases/latest) and have experienced a regression (something that used to work in previous version).
   - type: input
     id: new-version
     attributes: