Update to newest output syntax

.github/workflows/ci.yml

@@ -104,13 +104,13 @@ jobs:
           VERSION=$(cargo pkgid --manifest-path lychee-lib/Cargo.toml | cut -d "#" -f2)
           if cargo search lychee-lib | grep -q \"$VERSION\"; then
             echo "Lychee-lib version $VERSION is already published. Skipping."
-            echo "::set-output name=published::true"
+            echo "published=true" >> $GITHUB_OUTPUT
           else
-            echo "::set-output name=published::false"
+            echo "published=false" >> $GITHUB_OUTPUT
           fi
 
       - name: cargo publish lychee-lib
-        if: steps.check-release.outputs.published== 'false'
+        if: steps.check-release.outputs.published == 'false'
         uses: actions-rs/cargo@v1
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}