trigger workflow when theres change to postman.json (#18129)

Author: wing328

.github/workflows/samples-postman.yaml

@@ -4,6 +4,7 @@ on:
   pull_request:
     paths:
       - samples/schema/postman-collection/python/**
+      - samples/schema/postman-collection/postman.json
       - .github/workflows/samples-postman.yaml
 jobs:
   build:

README.md

@@ -1114,8 +1114,9 @@ Here is a list of template creators:
    * GraphQL: @wing328 [:heart:](https://www.patreon.com/wing328)
    * Ktorm: @Luiz-Monad
    * MySQL: [@ybelenko](https://github.com/ybelenko)
+   * Postman Collection: @gcatanese
    * Protocol Buffer: @wing328
-   * WSDL @adessoDpd
+   * WSDL: @adessoDpd
 
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