chore: rename action

Author: Christoph Bühler

.github/workflows/github-pages.yml

@@ -15,7 +15,7 @@ jobs:
           dotnet-version: 3.1.401
       - name: Setup MS Build
         uses: microsoft/[email protected]
-      - name: Install DocFX & Rsync
+      - name: Install DocFX
         uses: crazy-max/ghaction-chocolatey@v1
         with:
           args: install docfx -y