--headers -> --header

src/content/docs/troubleshooting/custom-headers.md

@@ -6,9 +6,9 @@ Some sites expect one or more custom headers to return a valid response.
 For example, crates.io expects a `Accept: text/html` header or else it
 will [return a 404](https://github.com/rust-lang/crates.io/issues/788).
 
-To fix that you can pass additional headers like so: `--headers "accept=text/html"`.
+To fix that you can pass additional headers like so: `--header "accept=text/html"`.
 You can use that argument multiple times to add more headers.
-Or, you can accept all content/MIME types: `--headers "accept=*/*"`.
+Or, you can accept all content/MIME types: `--header "accept=*/*"`.
 
 Learn more about the `Accept` header
 [over at MDN](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept).