Address Copilot review: validation checklist now catches the <Command> template placeholder

The README template uses 'Get-Help -Name <Command> -Examples' and the guidance
tells authors to replace <Command>, but the validation Select-String only matched
'-Name ''CommandName''' and <CommandName>, so a README shipping <Command>
unchanged would pass. Add <Command> to the pattern list.

Author: MariusStorhaug

src/docs/Modules/Repository-Defaults.md

@@ -279,8 +279,9 @@ Before opening a README-only PR, check that the README follows the default and d
 ```powershell
 Select-String -Path README.md -SimpleMatch -Pattern 'Greet-Entity', 'PSModuleTemplate', 'YourModuleName'
 Select-String -Path README.md -SimpleMatch -Pattern '{{ NAME }}', '{{ DESCRIPTION }}'
-Select-String -Path README.md -SimpleMatch -Pattern "-Name 'CommandName'", '<CommandName>'
-Select-String -Path README.md -Pattern '^## Commands$'
+Select-String -Path README.md -SimpleMatch -Pattern '<Command>', '<CommandName>', "-Name 'CommandName'"
+Select-String -Path README.md -Pattern '^## (Commands|Capabilities)$'
+Select-String -Path README.md -Pattern '^Install-Module\b'
 git diff --check -- README.md
 ```