chore(transport): Update url to http crate document (#2173)

Author: tottoto

tonic/src/transport/service/grpc_timeout.rs

@@ -113,7 +113,7 @@ fn try_parse_grpc_timeout(
         .and_then(|s| if s.is_empty() { Err(val) } else { Ok(s) })?
         // `HeaderValue::to_str` only returns `Ok` if the header contains ASCII so this
         // `split_at` will never panic from trying to split in the middle of a character.
-        // See https://docs.rs/http/0.2.4/http/header/struct.HeaderValue.html#method.to_str
+        // See https://docs.rs/http/1/http/header/struct.HeaderValue.html#method.to_str
         //
         // `len - 1` also wont panic since we just checked `s.is_empty`.
         .split_at(val.len() - 1);