readme: document encryption features

Author: markus-wa

README.md

@@ -155,11 +155,12 @@ The full API documentation is available here on [pkg.go.dev](https://pkg.go.dev/
 * Chat & console messages <sup id="achat1">1</sup> - [docs](https://pkg.go.dev/github.com/markus-wa/demoinfocs-golang/v2/pkg/demoinfocs/events?tab=doc#ChatMessage) / [example](https://github.com/markus-wa/demoinfocs-golang/tree/master/examples/print-events)
 * Matchmaking ranks (official MM demos only) - [docs](https://pkg.go.dev/github.com/markus-wa/demoinfocs-golang/v2/pkg/demoinfocs/events?tab=doc#RankUpdate)
 * Full POV demo support <sup id="achat1">2</sup>
+* Support for encrypted net-messages (if the decryption key is provided via [`ParserConfig.NetMessageDecryptionKey`](https://pkg.go.dev/github.com/markus-wa/demoinfocs-golang/v2@master/pkg/demoinfocs#ParserConfig))
 * JavaScript (browser / Node.js) support via WebAssembly - [example](https://github.com/markus-wa/demoinfocs-wasm)
 * [Easy debugging via build-flags](#debugging)
 * Built with performance & concurrency in mind
 
-1. <small id="f1">Only for some demos; in MM demos the chat is encrypted for example.</small>
+1. <small id="f1">In MM demos the chat is encrypted, see [`ParserConfig.NetMessageDecryptionKey`](https://pkg.go.dev/github.com/markus-wa/demoinfocs-golang/v2@master/pkg/demoinfocs#ParserConfig) and [`MatchInfoDecryptionKey()`](https://pkg.go.dev/github.com/markus-wa/demoinfocs-golang/v2@master/pkg/demoinfocs#MatchInfoDecryptionKey).</small>
 2. <small id="f2">Better than some other parsers at the time of writing.</small>
 
 ## Performance / Benchmarks