fixed deployment action

needing to commit _before_ testing the changes is rather annoying. fortunately, once i get this right, it should be easy to reuse for other projects.

.github/workflows/main.yml

@@ -22,17 +22,17 @@ jobs:
 
       # publishes Blazor project to the release-folder
       - name: Publish .NET Core Project
-        run: dotnet publish Poemdown.Blaze.csproj -c Release -o release --nologo
+        run: dotnet publish solution/Poemdown.Blaze/Poemdown.Blaze.csproj -c Release -o release --nologo
 
       # changes the base-tag in index.html to match GitHub Pages repository subdirectory
       - name: Change base-tag in index.html from / to /poemdown/
-        run: sed -i 's/<base href="\/" \/>/<base href="\/poemdown\/" \/>/g' release/wwwroot/index.html
+        run: sed -i 's/<base href="\/"\/>/<base href="\/poemdown\/"\/>/g' release/wwwroot/index.html
 
       # copy index.html to 404.html to serve the same file when a file is not found
       - name: copy index.html to 404.html
         run: cp release/wwwroot/index.html release/wwwroot/404.html
 
-      # add .nojekyll file to tell GitHub pages to not treat this as a Jekyll project. (Allow files and folders starting with an underscore)
+      # add .nojekyll file to tell GitHub pages to not treat this as a Jekyll project
       - name: Add .nojekyll file
         run: touch release/wwwroot/.nojekyll