niv ic-hs: update e727feca -> f718f74d

## Changelog for ic-hs:
Branch: master
Commits: [dfinity/ic-hs@e727feca...f718f74d](dfinity/ic-hs@e727fec...f718f74)

* [`99efc33f`](dfinity/ic-hs@99efc33) sync node height before making an update call in compliance tests ([dfinity/ic-hs⁠#213](https://togithub.com/dfinity/ic-hs/issues/213))
* [`4bdf6c35`](dfinity/ic-hs@4bdf6c3) sync node height before getStateCert ([dfinity/ic-hs⁠#214](https://togithub.com/dfinity/ic-hs/issues/214))
* [`f718f74d`](dfinity/ic-hs@f718f74) retry on http status of 429 ([dfinity/ic-hs⁠#215](https://togithub.com/dfinity/ic-hs/issues/215))

Author: dfinity-bot

nix/sources.json

@@ -40,10 +40,10 @@
         "homepage": "",
         "owner": "dfinity",
         "repo": "ic-hs",
-        "rev": "e727fecab6bad1401a65a50773637e46b8a14e0e",
-        "sha256": "183xcavjkfsa2hgx9s67qxg7hfykykmw0wbzd4458rkiqb164wmc",
+        "rev": "f718f74dc2c4bc9a13d45c6b9cff853684c0e2b2",
+        "sha256": "0akij2c2aynd36kc2bvrkfhg8r942w11hd65sdvjnih31n8ci8ij",
         "type": "tarball",
-        "url": "https://github.com/dfinity/ic-hs/archive/e727fecab6bad1401a65a50773637e46b8a14e0e.tar.gz",
+        "url": "https://github.com/dfinity/ic-hs/archive/f718f74dc2c4bc9a13d45c6b9cff853684c0e2b2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "ic-wasm": {