niv ic-wasm: update 99482401 -> 12f4cb76 (#4711)

## Changelog for ic-wasm:
Branch: main
Commits: [dfinity/ic-wasm@99482401...12f4cb76](dfinity/ic-wasm@9948240...12f4cb7)

* [`e4e2b90a`](dfinity/ic-wasm@e4e2b90) chore: fix release CI ([dfinity/ic-wasm⁠#74](https://togithub.com/dfinity/ic-wasm/issues/74))
* [`12f4cb76`](dfinity/ic-wasm@12f4cb7) chore: release 0.8.6 ([dfinity/ic-wasm⁠#75](https://togithub.com/dfinity/ic-wasm/issues/75))

default.nix

@@ -611,7 +611,7 @@ rec {
     nixpkgs.rustPlatform.buildRustPackage {
       name = "ic-wasm";
       src = nixpkgs.sources.ic-wasm;
-      cargoSha256 = "sha256-wukv9q2nBPQM8XKwwzn/O2NfmiQYgiIOIzXRdvya4p8=";
+      cargoSha256 = "sha256-ydrwvAigwliqRE8/dIeogpERD5sFqRYrQ5N301bOo1Y=";
       doCheck = false;
       patchPhase = ''
         mkdir -p .cargo

nix/sources.json

@@ -51,10 +51,10 @@
         "homepage": null,
         "owner": "dfinity",
         "repo": "ic-wasm",
-        "rev": "994824019228883203ebc28a3081ba16a0521d19",
-        "sha256": "0753sfh9zjrf6z96cxnglf1ij7c6j21377zsy0g2dkiqvzvshrsl",
+        "rev": "12f4cb76d0861aa7f72cea5741656213b4ef723b",
+        "sha256": "1ayxzgh2bvmj4c4yl9q20fmr00kyil6475lsfcwrvslg34s3lqlv",
         "type": "tarball",
-        "url": "https://github.com/dfinity/ic-wasm/archive/994824019228883203ebc28a3081ba16a0521d19.tar.gz",
+        "url": "https://github.com/dfinity/ic-wasm/archive/12f4cb76d0861aa7f72cea5741656213b4ef723b.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "libtommath": {