chore: Update Mainnet IC revisions canisters file (#4503)

Update mainnet system canisters revisions file to include the latest
WASM version released on the mainnet.

This PR is created automatically using
[`mainnet_revisions.py`](https://github.com/dfinity/ic/blob/master/ci/src/mainnet_revisions/mainnet_revisions.py)

Co-authored-by: CI Automation <infra+github-automation@dfinity.org>

Author: pr-creation-bot-dfinity-ic[bot]

mainnet-canister-revisions.json

@@ -68,8 +68,8 @@
     "sha256": "fd25a4e2e283b498c3be1aaf63cc9b2726264d78a12b12f43ad453ceeb575e7c"
   },
   "governance": {
-    "rev": "c5dee3a11b79da7b5c433574f38605d75c9feaf5",
-    "sha256": "9568fd9abacc62731d4c2c8839ab9e4df0856cfd07f7689177d1772b8b6e82ae"
+    "rev": "cbebf5d2d74bb97b616a8204df43d2ddfc3560aa",
+    "sha256": "2ba2ba54cd5b68808c1415b42aec05dc67a822a07cbacfcb30871fc663327999"
   },
   "index": {
     "rev": "2fe8aefafcb2fbee6fdb2785374d5de715560269",