niv motoko-base: update adb24da4 -> 4ace2667 (#4803)

## Changelog for motoko-base:
Branch: next-moc
Commits: [dfinity/motoko-base@adb24da4...4ace2667](dfinity/motoko-base@adb24da...4ace266)

* [`4ace2667`](dfinity/motoko-base@4ace266) feat: add `replyDeadline` to `ExperimentalInternetComputer` ([dfinity/motoko-base⁠#677](https://togithub.com/dfinity/motoko-base/issues/677))

nix/sources.json

@@ -75,10 +75,10 @@
         "homepage": "",
         "owner": "dfinity",
         "repo": "motoko-base",
-        "rev": "adb24da4ce084a26bcd8daf046140eca8f76ac4a",
-        "sha256": "0lhyskqpsijc84c168icivmcg30pcac3645m6s3qa28zsw58k73h",
+        "rev": "4ace26675fc1222daefb24ac160e0d03000429d2",
+        "sha256": "0v05djp8ymwc5c9y8ms80cqzx8h2jb9fskfmw8l2mszdcwn8ahsw",
         "type": "tarball",
-        "url": "https://github.com/dfinity/motoko-base/archive/adb24da4ce084a26bcd8daf046140eca8f76ac4a.tar.gz",
+        "url": "https://github.com/dfinity/motoko-base/archive/4ace26675fc1222daefb24ac160e0d03000429d2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "motoko-matchers": {