bash is used for every OS, so "cp" can be used, too

.github/workflows/build.yml

@@ -57,12 +57,7 @@ jobs:
           files: ./dist/joplin-sticky-notes*
       - name: Normalize executable name
         # this is needed, because wildcards aren't expanded in the following action
-        run:   |
-            if [ "$RUNNER_OS" == "Windows" ]; then
-                copy ./dist/joplin-sticky-notes* ./dist/joplin-sticky-notes
-            else
-                cp ./dist/joplin-sticky-notes* ./dist/joplin-sticky-notes
-            fi
+        run: cp ./dist/joplin-sticky-notes* ./dist/joplin-sticky-notes
         shell: bash
       - name: Run the executable (smoke test)
         uses: coactions/setup-xvfb@v1