Bump curl from 0.4.37 to 0.4.38

Bumps [curl](https://github.com/alexcrichton/curl-rust) from 0.4.37 to 0.4.38.
- [Release notes](https://github.com/alexcrichton/curl-rust/releases)
- [Commits](alexcrichton/curl-rust@curl-sys-0.4.37...0.4.38)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -13,7 +13,7 @@ edition = "2018"
 [dependencies]
 cargo = "0.53"
 crates-io = "0.33" # Keep in sync with version pulled by Cargo
-curl = "0.4.37"
+curl = "0.4.38"
 env_logger = "0.8"
 anyhow = "1.0.40"
 log = "0.4"