Add disclaimer

src/pages/core/architecture/pinning.mdx

@@ -6,6 +6,11 @@ import { Callout } from "nextra/components";
 
 # Contract pinning
 
+<Callout type="info">
+ This is done by chain maintainers and not by contract developers. It's not something you need to
+ worry about when writing contracts but can be a fun thing to know.
+</Callout>
+
 Contract pinning is a feature of the CosmWasm virtual machine which ensures that a previously stored
 compiled contract code (module) is started from a dedicated in-memory cache. Starting a module from
 memory takes ~45µs compared to 1.5ms when loaded from disk (33x faster).
@@ -85,5 +90,4 @@ which required certain contracts to be executed in every block.
  https://medium.com/confio/neutron-case-study-optimizing-gas-usage-with-contract-pinning-5970a109c706
 
 [^1]: https://github.com/CosmWasm/wasmd/pull/1799
-
 [^2]: https://github.com/CosmWasm/cosmwasm/issues/2034