publish json schemas as a single URL

Signed-off-by: Chanwit Kaewkasi <chanwit@gmail.com>

This change publishes the auto-generated JSON schemas as a single URL,
so that it is consumable by a tool like VS Code.

The CRD generator creates 2 files, a tar.gz for Kubeval,
and another one is a JSON file. The JSON file is a combination of
all schemas, put under the "oneOf" operator.

.github/workflows/release.yaml

@@ -61,8 +61,10 @@ jobs:
         with:
           crd: all-crds.yaml
           output: schemas
+          combined_filename: crd-schemas.json
       - name: Archive the OpenAPI JSON schemas
         run: |
+          mv schemas/crd-schemas.json ./output/crd-schemas.json
           tar -czvf ./output/crd-schemas.tar.gz -C schemas .
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v1