Refine function documentation guidelines by clarifying parameter block structure and comment-based help formatting

Author: johlju

.github/instructions/dsc-community-style-guidelines.instructions.md

@@ -103,9 +103,9 @@ function Get-Something
 
 - Include `[CmdletBinding()]` on every function
 - Parameter block at top
-- Non-empty parameter has opening and closing parentheses on their own line (empty `param ()` if no parameters)
-- Comment-based help with SYNOPSIS, DESCRIPTION and PARAMETER sections, before the function or class keyword
-- Each comment-based help keyword should be indented with 4 spaces and each keyword's text should be indented 8 spaces.
+- Parameter block: `param ()` if empty, else opening/closing parentheses on own lines
+- Comment-based help: SYNOPSIS, DESCRIPTION, PARAMETER sections before function/class
+- Help indentation: keywords 4 spaces, text 8 spaces
 - `[OutputType()]` for functions with output
 - All parameters use `[Parameter()]` attribute, mandatory parameters use `[Parameter(Mandatory = $true)]`
 - Parameter attributes on separate lines