fix a typo

content/til/how-to-quickly-create-a-header-modifying-reverse-proxy-with-mitmproxy.md

@@ -11,7 +11,7 @@ I'm currently in the process of testing some changes on OctoPrint involving its
 for that needed to quickly set up a reverse proxy that would modify the headers of the requests going to the development server
 for some quick testing. 
 
-Specifically, I wanted a quick CLI tool that would allow me to set up a reverse proxy listening on port 5000, forwarding to 
+Specifically, I wanted a quick CLI tool that would allow me to set up a reverse proxy listening on port 5555, forwarding to 
 `http://localhost:5000` while also setting the headers `X-Remote-User` to `remote` and `X-Remote-Host` to `localhost:5555`.
 
 Enter [`mitmproxy`](https://mitmproxy.org/), or more specifically its `mitmdump` tool, which turned out to be a great tool for this job.