Add mermaid digram for connections and reword #2

src/content/docs/ssl/post-quantum-cryptography/index.mdx

@@ -45,10 +45,26 @@ A hybrid key agreement lays the groundwork as more and more [clients](#visitor-t
 
 ## Three connections in the life of a request
 
-### Visitor to Cloudflare
+```mermaid
+flowchart LR
+        accTitle: Three connections - from visitor to Cloudflare to origin server
+        accDescr: Diagram showing connections for an uncached request.
+        A[Visitor]
+        subgraph Cloudflare
+        X[(Cloudflare <br />service A)]
+				B[(Cloudflare <br />service B)]
+        end
+        C[(Origin server)]
+
+        A --1--> X
+				X --2--> B
+        B --3--> C
+```
+
+### 1. Visitor to Cloudflare
 
 As of [october 2023](https://blog.cloudflare.com/post-quantum-for-all/), all websites and APIs served through Cloudflare over TLS 1.3 support post-quantum hybrid key agreement. However, the connection is only post-quantum secured if the client also supports post-quantum cryptography.
 
-### Internal services
+### 2. Internal connections
 
-### Cloudflare to your origin
+### 3. Cloudflare to your origin