chore: add docs

Signed-off-by: Pablo Eliseo <[email protected]>

Author: pabloelisseo

docs/docs/api/Client.md

@@ -32,6 +32,9 @@ Returns: `Client`
 * **allowH2**: `boolean` - Default: `false`. Enables support for H2 if the server has assigned bigger priority to it through ALPN negotiation.
 * **useH2c**: `boolean` - Default: `false`. Enforces h2c for non-https connections.
 * **maxConcurrentStreams**: `number` - Default: `100`. Dictates the maximum number of concurrent streams for a single H2 session. It can be overridden by a SETTINGS remote frame.
+* **http2**: `object` (optional) - HTTP/2 session options.
+  * **initialWindowSize**: `number` (optional) - Sets the HTTP/2 stream-level flow-control window size (SETTINGS_INITIAL_WINDOW_SIZE). Must be a positive integer greater than 0. See [RFC 7540 Section 6.9.2](https://datatracker.ietf.org/doc/html/rfc7540#section-6.9.2) for more details.
+  * **connectionWindowSize**: `number` (optional) - Sets the HTTP/2 connection-level flow-control window size using `ClientHttp2Session.setLocalWindowSize()`. Must be a positive integer greater than 0. This controls the total amount of data that can be sent on the connection before receiving flow control updates from the peer. See [Node.js HTTP/2 documentation](https://nodejs.org/api/http2.html#clienthttp2sessionsetlocalwindowsize) for more details.
 
 > **Notes about HTTP/2**
 > - It only works under TLS connections. h2c is not supported.