fix: correct usage message filename in sample clients

Signed-off-by: Artem Muterko <artem@sopho.tech>

Author: archy-rock3t-cloud

samples/http-image-cloudevents/client.py

@@ -64,7 +64,7 @@ def send_structured_cloud_event(url: str):
 if __name__ == "__main__":
     # Run client.py via: 'python3 client.py http://localhost:3000/'
     if len(sys.argv) < 2:
-        sys.exit("Usage: python with_requests.py <CloudEvents controller URL>")
+        sys.exit("Usage: python client.py <CloudEvents controller URL>")
 
     url = sys.argv[1]
     send_binary_cloud_event(url)

samples/http-json-cloudevents/client.py

@@ -55,7 +55,7 @@ def send_structured_cloud_event(url):
     # expects a url from command line.
     # e.g. python3 client.py http://localhost:3000/
     if len(sys.argv) < 2:
-        sys.exit("Usage: python with_requests.py <CloudEvents controller URL>")
+        sys.exit("Usage: python client.py <CloudEvents controller URL>")
 
     url = sys.argv[1]
     send_binary_cloud_event(url)