adds udpated version of diagram indicating custom config

develop/parachains/intro-polkadot-sdk.md

@@ -52,16 +52,46 @@ Every blockchain platform relies on a decentralized network of computers—calle
 
 ### FRAME
 
-FRAME provides the core modular and extensible components that make the Substrate SDK flexible and adaptable to different use cases. FRAME includes Rust-based libraries that simplify the development of application-specific logic. Most of the functionality that FRAME provides takes the form of plug-in modules called [pallets](/polkadot-protocol/glossary#pallet){target=\_blank} that you can add and configure to suit your requirements.
+FRAME provides the core modular and extensible components that make the Substrate SDK flexible and adaptable to different use cases. FRAME includes Rust-based libraries that simplify the development of application-specific logic. Most of the functionality that FRAME provides takes the form of plug-in modules called [pallets](/polkadot-protocol/glossary#pallet){target=\_blank} that you can add and configure to suit your requirements for a custom runtime.
 
 ```mermaid
 graph LR
     subgraph SP["<b style='font-size:18px;'>Runtime</b>"]
         direction LR
-        S1[Timestamp]~~~S2[Aura]~~~S3[GRANDPA]
-        S4[Balances]~~~S5[Transaction\nPayment]~~~S6[Sudo]
-    end
+        Timestamp ~~~ Aura ~~~ GRANDPA
+        Balances ~~~ TransactionPayment ~~~ Sudo
+        subgraph Timestamp["Timestamp"]
+            SS1[Custom Config]
+        end
+        subgraph Aura["Aura"]
+            SS2[Custom Config]
+        end
+        subgraph GRANDPA["GRANDPA"]
+            SS3[Custom Config]
+        end
+        subgraph Balances["Balances"]
+            SS4[Custom Config]
+        end
+        subgraph TransactionPayment["Transaction Payment"]
+            SS5[Custom Config]
+        end
+        subgraph Sudo["Sudo"]
+            SS6[Custom Config]
+        end
+        style Timestamp stroke:#FF69B4
+        style Aura stroke:#FF69B4
+        style GRANDPA stroke:#FF69B4
+        style Balances stroke:#FF69B4
+        style TransactionPayment stroke:#FF69B4
+        style Sudo stroke:#FF69B4
+        style SS1 stroke-dasharray: 5
+        style SS2 stroke-dasharray: 5
+        style SS3 stroke-dasharray: 5
+        style SS4 stroke-dasharray: 5
+        style SS5 stroke-dasharray: 5
+        style SS6 stroke-dasharray: 5
 
+    end
     subgraph AP["<b style='font-size:18px;'>FRAME Pallets</b>"]
         direction LR
         A1[Aura]~~~A2[BABE]~~~A3[GRANDPA]~~~A4[Transaction\nPayment]