Update documentation (#39603)

<!-- Enter a brief description/summary of your PR here. What does it
fix/change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
This PR applies a series of grammar, punctuation, and stylistic updates
across the main README and GitHub templates to improve consistency,
clarity, and alignment with formatting guidelines.

### File-Level Changes

| Change | Details | Files |
| ------ | ------- | ----- |
| Updated README.md for grammar, punctuation, and phrasing consistency |
<ul><li>Inserted missing commas and adjusted articles for clearer
sentences</li><li>Standardized hyphenation and removed extra spaces
around slashes</li><li>Refined bullet list punctuation and corrected
pluralization (‘number of bugs’)</li></ul> | `README.md` |
| Refined pull request template text for clarity and uniform formatting
| <ul><li>Hyphenated “end-user-facing” and added Oxford comma in
checklist items</li><li>Adjusted phrasing in communication bullet for
parallel structure</li><li>Reworded placeholder comment for detailed PR
description</li></ul> | `.github/pull_request_template.md` |
| Standardized issue templates with grammar and placeholder improvements
| <ul><li>Clarified label descriptions and added missing commas in
placeholders</li><li>Unified question phrasing across bug, feature,
translation, and docs templates</li><li>Corrected capitalization and
refined instructions for consistency</li></ul> |
`.github/ISSUE_TEMPLATE/bug_report.yml`<br/>`.github/ISSUE_TEMPLATE/feature_request.yml`<br/>`.github/ISSUE_TEMPLATE/translation_issue.yml`<br/>`.github/ISSUE_TEMPLATE/documentation-issue.yml`
|

---
## PR Checklist

- [ ] **Closes:** #xxx
- [X] **Communication:** I've already discussed this with core
contributors. If the work hasn't been agreed, this work might be
rejected
- [X] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [X] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here:
https://github.com/MicrosoftDocs/windows-dev-docs/pull/5447

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

---------

Co-authored-by: Jay <65828559+Jay-o-Way@users.noreply.github.com>

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -12,7 +12,7 @@ body:
   attributes:
     label: Microsoft PowerToys version
     placeholder: X.XX.X
-    description: Hover over system tray icon or look at Settings
+    description: Hover over the system tray icon or look at Settings
   validations:
     required: true
 
@@ -20,7 +20,7 @@ body:
   type: dropdown
   attributes:
     label: Installation method
-    description: How / Where was PowerToys installed from?
+    description: How / where was PowerToys installed from?
     multiple: true
     options:
       - GitHub