ci(json-schema-check): make it possible to run it manually too (#6462)

Signed-off-by: M. Fatih Cırıt <mfc@leodrive.ai>
Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

Author: xmfcx

.github/workflows/json-schema-check.yaml

@@ -5,6 +5,7 @@ on:
     paths:
       - "**/schema/*.schema.json"
       - "**/config/*.param.yaml"
+  workflow_dispatch:
 
 jobs:
   json-schema-check: