build: niv advisory-db: update 4aa51756 -> 926c7faf (#3265)

## Changelog for advisory-db:
Branch: main
Commits: [rustsec/advisory-db@4aa51756...926c7faf](rustsec/advisory-db@4aa5175...926c7fa)

* [`3cf8a935`](rustsec/advisory-db@3cf8a93) Add advisory for unsoundness in intaglio symbol interners ([RustSec/advisory-db⁠#1732](http://r.duckduckgo.com/l/?uddg=https://github.com/RustSec/advisory-db/issues/1732))
* [`926c7faf`](rustsec/advisory-db@926c7fa) Assigned RUSTSEC-2023-0048 to intaglio ([RustSec/advisory-db⁠#1733](http://r.duckduckgo.com/l/?uddg=https://github.com/RustSec/advisory-db/issues/1733))

nix/sources.json

@@ -6,10 +6,10 @@
         "homepage": "https://rustsec.org",
         "owner": "RustSec",
         "repo": "advisory-db",
-        "rev": "4aa517564d1d06f0e79784c8ad973a59d68aa9c8",
-        "sha256": "1nxpky4wf9azi1kjcxjiq9b7phlcbspp8hixpbq7h0wycb24jgs3",
+        "rev": "926c7faf15c82448b6427ba3faee9398c43c0524",
+        "sha256": "09xf5q18n9f97f76rhlcxzq0kcbqb001zl6ppjj69zb26hxh42ls",
         "type": "tarball",
-        "url": "https://github.com/RustSec/advisory-db/archive/4aa517564d1d06f0e79784c8ad973a59d68aa9c8.tar.gz",
+        "url": "https://github.com/RustSec/advisory-db/archive/926c7faf15c82448b6427ba3faee9398c43c0524.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "canister_sandbox-x86_64-darwin": {