Update flowchart

Author: maxvp

src/content/docs/cloudflare-one/policies/gateway/proxy.mdx

@@ -23,15 +23,23 @@ Gatway uses the [Happy Eyeballs algorithm](https://datatracker.ietf.org/doc/html
 
 ```mermaid
 flowchart TD
-    A[Client sends TCP SYN to Gateway] --> B[Gateway sends TCP SYN to Origin]
-    B --> C{{Origin responds with TCP SYN/ACK?}}
-    C -->|Yes| D[Complete handshake with Origin]
-    C -->|No| E[Connection fails]
-    D --> F[Complete handshake with Client]
-    F --> G[Firewall inspects traffic from Client]
-    G --> H{{Firewall allows connection?}}
-    H -->|Yes| I[Gateway proxies data bidirectionally]
-    H -->|No| J[Connection blocked by Firewall]
+    %% Accessibility
+    accTitle: How Gateway proxy works
+    accDescr: Flowchart describing how the Gateway proxy uses the Happy Eyeballs algorithm to establish TCP connections and proxy user traffic.
+
+    %% Flowchart
+    A[WARP client sends TCP SYN to Gateway] --> B[Gateway sends TCP SYN to origin server]
+    B --> C{{Origin server responds with TCP SYN-ACK?}}
+    C -->|Yes| E[TCP handshakes completed]
+    C -->|No| D[Connection fails]
+    E --> F{{Connection allowed?}}
+    F -->|Yes| G[Gateway proxies traffic bidirectionally]
+    F -->|No| H[Connection blocked by firewall policies]
+
+    %% Styling
+    style D stroke:#D50000
+    style G stroke:#00C853
+    style H stroke:#D50000
 ```
 
 ## Proxy protocols