niv motoko-base: update fbae09e4 -> 494480ac

## Changelog for motoko-base:
Branch: next-moc
Commits: [dfinity/motoko-base@fbae09e4...494480ac](dfinity/motoko-base@fbae09e...494480a)

* [`414150da`](dfinity/motoko-base@414150d) Motoko 0.9.2
* [`6bea7441`](dfinity/motoko-base@6bea744) Blob.compare: Use new blob comparison prim ([dfinity/motoko-base⁠#567](https://togithub.com/dfinity/motoko-base/issues/567))

nix/sources.json

@@ -64,10 +64,10 @@
         "homepage": null,
         "owner": "dfinity",
         "repo": "motoko-base",
-        "rev": "fbae09e4ae8b088d40b12f3a980ddfbfea4c0ee0",
-        "sha256": "0rpa8q7d28x095njfpx6iz05rb8jqyivw18z7y59mdspbl1858i1",
+        "rev": "494480ac358943491190d5a2553f31667f4fd94a",
+        "sha256": "04cdjh7bgnlplq8yd9s7433wndhdbpsgqdg1w97i5y3av4r4fgnn",
         "type": "tarball",
-        "url": "https://github.com/dfinity/motoko-base/archive/fbae09e4ae8b088d40b12f3a980ddfbfea4c0ee0.tar.gz",
+        "url": "https://github.com/dfinity/motoko-base/archive/494480ac358943491190d5a2553f31667f4fd94a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "motoko-matchers": {