chore(deps): bump bls from v7.0.1 to v7.1.0 in /native/bls_nif

---
updated-dependencies:
- dependency-name: bls
  dependency-version: cfb1f7331064b758c6786e4e1dc15507af5ff5d1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

native/bls_nif/Cargo.lock

@@ -11,4 +11,4 @@ crate-type = ["cdylib"]
 
 [dependencies]
 rustler = "0.36.1"
-bls = { git = "https://github.com/sigp/lighthouse", package = "bls", rev = "v7.0.1" }
+bls = { git = "https://github.com/sigp/lighthouse", package = "bls", rev = "v7.1.0" }