chore(deps): bump ic-stable-structures from 0.6.6 to 0.6.7

Bumps [ic-stable-structures](https://github.com/dfinity/stable-structures) from 0.6.6 to 0.6.7.
- [Release notes](https://github.com/dfinity/stable-structures/releases)
- [Commits](dfinity/stable-structures@v0.6.6...v0.6.7)

---
updated-dependencies:
- dependency-name: ic-stable-structures
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -12,7 +12,7 @@ ic-cdk-macros = "0.16.0"
 ic-cdk-timers = "0.9.0"
 ic-cycles-ledger-client = { path = "src/cycles_ledger/client" }
 ic-ledger-types = "0.13.0"
-ic-stable-structures = "0.6.6"
+ic-stable-structures = "0.6.7"
 ic-metrics-encoder = "1.1.1"
 ic-canister-sig-creation = "1.1.0"
 ic-verifiable-credentials = "1.0.1"