ci(helm): fix chart-releaser install

Using ::add-path:: is deprecated and fails.

.github/workflows/helm-repo-index.yaml

@@ -1,5 +1,6 @@
 name: Helm repo index
-on: release
+on: [push]
+#on: release
 jobs:
   publish:
     name: Publish helm repo index to gh-pages
@@ -9,25 +10,23 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install chart-releaser
-        env:
-          VERSION: 1.0.0-beta.1
-        run: |
-          mkdir -p $GITHUB_WORKSPACE/bin
-
-          curl -Lo $GITHUB_WORKSPACE/cr.tar.gz https://github.com/helm/chart-releaser/releases/download/v${VERSION}/chart-releaser_${VERSION}_linux_amd64.tar.gz
-          tar -xzf $GITHUB_WORKSPACE/cr.tar.gz -C $GITHUB_WORKSPACE/bin cr
-          chmod +x $GITHUB_WORKSPACE/bin/cr
-          echo "::add-path::$GITHUB_WORKSPACE/bin"
+        uses: giantswarm/install-binary-action@v1.0.0
+        with:
+          binary: "cr"
+          version: "1.4.0"
+          download_url: https://github.com/helm/chart-releaser/releases/download/v${version}/chart-releaser_${version}_linux_amd64.tar.gz
+          tarball_binary_path: ${binary}
+          smoke_test: ${binary} version
 
       - name: Generate index.yaml
         run: |
           mkdir .helm-index
           cr index \
-            --charts-repo https://apricote.github.io/Listory
-            --package-path charts
-            --owner owner
-            --git-repo Listory
-            --index-path .helm-index/index.yaml
+            --package-path charts \
+            --owner ${GITHUB_REPOSITORY_OWNER} \
+            --git-repo ${GITHUB_REPOSITORY} \
+            --index-path .helm-index/index.yaml \
+            --push
 
       - name: Publish to gh-pages
         uses: JamesIves/github-pages-deploy-action@releases/v3