niv motoko-base: update ccbf7a55 -> ee08ac75

## Changelog for motoko-base:
Branch: next-moc
Commits: [dfinity/motoko-base@ccbf7a55...ee08ac75](dfinity/motoko-base@ccbf7a5...ee08ac7)

* [`debdf22c`](dfinity/motoko-base@debdf22) document new error code
* [`2f30c666`](dfinity/motoko-base@2f30c66) Refactor Stack tests to use matchers ([dfinity/motoko-base⁠#507](https://togithub.com/dfinity/motoko-base/issues/507))
* [`1b8b6352`](dfinity/motoko-base@1b8b635) Flesh out HashMap docs ([dfinity/motoko-base⁠#508](https://togithub.com/dfinity/motoko-base/issues/508))
* [`5f96ccce`](dfinity/motoko-base@5f96ccc) doc: add examples to Buffer ([dfinity/motoko-base⁠#463](https://togithub.com/dfinity/motoko-base/issues/463))

nix/sources.json

@@ -64,10 +64,10 @@
         "homepage": null,
         "owner": "dfinity",
         "repo": "motoko-base",
-        "rev": "ccbf7a55d44cb40a2be16f778bdc6e6d3a2f8180",
-        "sha256": "09jb6mr9dm8knc1m8rw05j3vqmr06gd0196y834jbfzff54id0nw",
+        "rev": "ee08ac752d81ee27083a411ae5e9c097ff6db12c",
+        "sha256": "01h9pffvh9ng34l8ir95icrdpvqbzgakzlrigmx9sx7ax9anx8lk",
         "type": "tarball",
-        "url": "https://github.com/dfinity/motoko-base/archive/ccbf7a55d44cb40a2be16f778bdc6e6d3a2f8180.tar.gz",
+        "url": "https://github.com/dfinity/motoko-base/archive/ee08ac752d81ee27083a411ae5e9c097ff6db12c.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "motoko-matchers": {