chore: update make go-bindings generation command (#180)

This commit ensures that the make file uses the right OpenAPI spec to
generate the go bindings.

Makefile

@@ -5,5 +5,5 @@ codegen:
 	go run github.com/deepmap/oapi-codegen/v2/cmd/[email protected] \
 		-package worker \
 		-generate types,client,chi-server,spec \
-		runner/openapi.json \
+		runner/openapi.yaml \
 		| awk '!/WARNING/' > worker/runner.gen.go