update shuttle runtime version

Author: Indosaram

.github/workflows/action.yml

@@ -17,5 +17,5 @@ jobs:
           shuttle-api-key: 8wWEvQ8J3I84KmhO
           project-id: proj_01JF90BSDEENEZS33SYZT735GR
           working-directory: "axum-react-chat-app/backend"
-          cargo-shuttle-version: "0.49.0"
+          cargo-shuttle-version: "0.55.0"
           extra-args: --allow-dirty --debug