docs(SRV): update

Author: SamyOubouaziz

pages/serverless-jobs/how-to/build-push-container-image.mdx

@@ -84,19 +84,19 @@ CMD ["./main"]
 
 3. Run the command below to log in to your Scaleway account in the terminal. Do not forget to replace the placeholder with your Container Registry namespace endpoint:
 
-    ```
+    ```sh
     docker login rg.fr-par.scw.cloud/your-container-registry-namespace -u nologin --password-stdin <<< "$SCW_SECRET_KEY"
     ```
 
 4. Tag your Docker image so it matches your Scaleway registry's format:
 
-    ```
+    ```sh
     docker tag my-application:latest rg.fr-par.scw.cloud/your-container-registry-namespace/my-application:latest
     ```
 
 5. Push the Docker image to the Scaleway Container Registry:
 
-    ```
+    ```sh
     docker push rg.fr-par.scw.cloud/your-container-registry-namespace/my-application:latest
     ```