sig-api-machinery: Add json subproject

Author: mrbobbytables

sig-api-machinery/README.md

@@ -72,6 +72,9 @@ The following [subprojects][subproject-definition] are owned by sig-api-machiner
   - [kubernetes/gengo](https://github.com/kubernetes/gengo/blob/master/OWNERS)
   - [kubernetes/kube-openapi](https://github.com/kubernetes/kube-openapi/blob/master/OWNERS)
   - [kubernetes/kubernetes/staging/src/k8s.io/code-generator](https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/code-generator/OWNERS)
+### json
+- **Owners:**
+  - [kubernetes-sigs/json](https://github.com/kubernetes-sigs/json/blob/main/OWNERS)
 ### kubernetes-clients
 - **Owners:**
   - [kubernetes-client/c](https://github.com/kubernetes-client/c/blob/master/OWNERS)

sigs.yaml

@@ -82,6 +82,9 @@ sigs:
     - https://raw.githubusercontent.com/kubernetes/gengo/master/OWNERS
     - https://raw.githubusercontent.com/kubernetes/kube-openapi/master/OWNERS
     - https://raw.githubusercontent.com/kubernetes/kubernetes/master/staging/src/k8s.io/code-generator/OWNERS
+  - name: json
+    owners:
+    - https://raw.githubusercontent.com/kubernetes-sigs/json/main/OWNERS
   - name: kubernetes-clients
     owners:
     - https://raw.githubusercontent.com/kubernetes-client/c/master/OWNERS