Update documentation.yml

Correct indentation for PowerShell.

Author: compnerd

.github/workflows/documentation.yml

@@ -7,6 +7,7 @@ on:
     paths:
       - 'Sources/**/*.swift'
       - .github/workflows/documentation.yml
+  workflow_dispatch:
 
 jobs:
   document:
@@ -75,12 +76,12 @@ jobs:
         foreach ($module in "CoreGraphics","SwiftWin32","SwiftWin32UI") {
           Get-ChildItem -Path site\$module -Recurse -File -Include "*.md" -Exclude _Footer.md,_Sidebar.md,index.md | ForEach-Object {
             Set-Content $_.FullName -value @"
-            ---
-            layout: default
-            title: $(_.BaseName -replace '(?<=\w)_','.')
-            parent: $($_.Directory.BaseName)
-            ---
-            "@,$(Get-Content $_.FullName)
+---
+layout: default
+title: $(_.BaseName -replace '(?<=\w)_','.')
+parent: $($_.Directory.BaseName)
+---
+"@,$(Get-Content $_.FullName)
           }
         }