doc: use real protocol names in ALPN example

PR-URL: #24232
Reviewed-By: James M Snell <[email protected]>

doc/api/tls.md

@@ -888,9 +888,10 @@ changes:
   * `ALPNProtocols`: {string[]|Buffer[]|Uint8Array[]|Buffer|Uint8Array}
     An array of strings, `Buffer`s or `Uint8Array`s, or a single `Buffer` or
     `Uint8Array` containing the supported ALPN protocols. `Buffer`s should have
-    the format `[len][name][len][name]...` e.g. `0x05hello0x05world`, where the
-    first byte is the length of the next protocol name. Passing an array is
-    usually much simpler, e.g. `['hello', 'world']`.
+    the format `[len][name][len][name]...` e.g. `'\x08http/1.1\x08http/1.0'`,
+    where the `len` byte is the length of the next protocol name. Passing an
+    array is usually much simpler, e.g. `['http/1.1', 'http/1.0']`.
+    Protocols earlier in the list have higher preference than those later.
   * `servername`: {string} Server name for the SNI (Server Name Indication) TLS
     extension. It is the name of the host being connected to, and must be a host
     name, and not an IP address. It can be used by a multi-homed server to