Change hyphen to underscore for variable

Author: maxvp

src/content/docs/cloudflare-one/policies/gateway/http-policies/common-policies.mdx

@@ -261,7 +261,7 @@ curl https://api.cloudflare.com/client/v4/accounts/{account_id}/gateway/rule\
   ],
   "traffic": "",
   "identity": "",
-  "device_posture": "any(device_posture.checks.passed[*] in {\"<POSTURE-CHECK-UUID>\"})"
+  "device_posture": "any(device_posture.checks.passed[*] in {\"<POSTURE_CHECK_UUID>\"})"
 }'
 ```
 
@@ -300,7 +300,7 @@ curl https://api.cloudflare.com/client/v4/accounts/{account_id}/gateway/rule\
   ],
   "traffic": "",
   "identity": "",
-  "device_posture": "any(device_posture.checks.passed[*] in {\"<POSTURE-CHECK-1-UUID>\"}) or any(device_posture.checks.passed[*] in {\"<POSTURE-CHECK-2-UUID>\"})"
+  "device_posture": "any(device_posture.checks.passed[*] in {\"<POSTURE_CHECK_1_UUID>\"}) or any(device_posture.checks.passed[*] in {\"<POSTURE_CHECK_2_UUID>\"})"
 }'
 ```