Update documentation.yml (#541)

Correct the indentation for embedded script properly.  Fix a missing `$`, exclude `Home.md`.

Author: compnerd

.github/workflows/documentation.yml

@@ -74,14 +74,14 @@ jobs:
     - name: Post-Process
       run: |
         foreach ($module in "CoreGraphics","SwiftWin32","SwiftWin32UI") {
-          Get-ChildItem -Path site\$module -Recurse -File -Include "*.md" -Exclude _Footer.md,_Sidebar.md,index.md | ForEach-Object {
+          Get-ChildItem -Path site\$module -Recurse -File -Include "*.md" -Exclude Home.md,_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)
           }
         }