docs(bun): Update the request param on protect method (#786)

I noticed this was incorrect in the bun doc comment.

arcjet-bun/README.md

@@ -40,7 +40,7 @@ tokens.
 import arcjet, { tokenBucket } from "@arcjet/bun";
 
 const aj = arcjet({
-  key: process.env.ARCJET_KEY!, // Get your site key from https://app.arcjet.com
+  key: Bun.env.ARCJET_KEY!, // Get your site key from https://app.arcjet.com
   rules: [
     // Create a token bucket rate limit. Other algorithms are supported.
     tokenBucket({
@@ -82,10 +82,7 @@ request with negligible performance impact.
 import arcjet, { shield } from "@arcjet/bun";
 
 const aj = arcjet({
-  // Get your site key from https://app.arcjet.com
-  // and set it as an environment variable rather than hard coding.
-  // See: https://nextjs.org/docs/app/building-your-application/configuring/environment-variables
-  key: process.env.ARCJET_KEY,
+  key: Bun.env.ARCJET_KEY, // Get your site key from https://app.arcjet.com
   rules: [
     shield({
       mode: "LIVE", // will block requests. Use "DRY_RUN" to log only

arcjet-bun/index.ts

@@ -91,7 +91,7 @@ export interface ArcjetBun<Props extends PlainObject> {
    * analyzed and then a decision made on whether to allow, deny, or challenge
    * the request.
    *
-   * @param req - An `IncomingMessage` provided to the request handler.
+   * @param request - A `Request` provided to the fetch handler.
    * @param props - Additonal properties required for running rules against a request.
    * @returns An {@link ArcjetDecision} indicating Arcjet's decision about the request.
    */