docs: add namespace key to pod/container config files

If no namespace field in config files, CRI-O will failed:
 setting pod sandbox name and id: cannot generate pod name without namespace

Signed-off-by: bin liu <bin@hyper.sh>

docs/how-to/data/crictl/busybox/container_config.json

@@ -1,6 +1,7 @@
 {
 	"metadata": {
-		"name": "busybox-container"
+		"name": "busybox-container",
+		"namespace": "test.kata"
 	},
 	"image": {
 		"image": "docker.io/library/busybox:latest"

docs/how-to/data/crictl/busybox/sandbox_config.json

@@ -1,7 +1,8 @@
 {
 	"metadata": {
 		"name": "busybox-pod",
-		"uid": "busybox-pod"
+		"uid": "busybox-pod",
+		"namespace": "test.kata"
 	},
 	"hostname": "busybox_host",
 	"log_directory": "",

docs/how-to/data/crictl/redis/redis_client_container_config.json

@@ -1,6 +1,7 @@
 {
 	"metadata": {
-		"name": "redis-client"
+		"name": "redis-client",
+		"namespace": "test.kata"
 	},
 	"image": {
 		"image": "docker.io/library/redis:6.0.8-alpine"

docs/how-to/data/crictl/redis/redis_client_sandbox_config.json

@@ -1,7 +1,8 @@
 {
 	"metadata": {
 		"name": "redis-client-pod",
-		"uid": "test-redis-client-pod"
+		"uid": "test-redis-client-pod",
+		"namespace": "test.kata"
 	},
 	"hostname": "redis-client",
 	"log_directory": "",

docs/how-to/data/crictl/redis/redis_server_container_config.json

@@ -1,6 +1,7 @@
 {
 	"metadata": {
-		"name": "redis-server"
+		"name": "redis-server",
+		"namespace": "test.kata"
 	},
 	"image": {
 		"image": "docker.io/library/redis:6.0.8-alpine"

docs/how-to/data/crictl/redis/redis_server_sandbox_config.json

@@ -1,7 +1,8 @@
 {
 	"metadata": {
 		"name": "redis-server-pod",
-		"uid": "test-redis-server-pod"
+		"uid": "test-redis-server-pod",
+		"namespace": "test.kata"
 	},
 	"hostname": "redis-server",
 	"log_directory": "",