Handle help file name in installer workflow

Author: megahirt

.github/workflows/build-test-installer-release.yml

@@ -106,7 +106,16 @@ jobs:
         run: nuget restore SayMore.sln
 
       - name: Copy CHM file into DistFiles
-        run: copy "docs\SayMoreHelp.chm" "DistFiles\SayMoreHelp.chm"
+        shell: pwsh
+        run: |
+          if (Test-Path 'docs\SayMoreHelp.chm') {
+            Copy-Item 'docs\SayMoreHelp.chm' 'DistFiles\SayMoreHelp.chm'
+          } elseif (Test-Path 'docs\SayMore.chm') {
+            Copy-Item 'docs\SayMore.chm' 'DistFiles\SayMoreHelp.chm'
+          } else {
+            Write-Error 'No CHM help file found in docs submodule.'
+            exit 1
+          }
 
       - name: Setup MSBuild
         uses: microsoft/setup-msbuild@v2