build(deps): bump actions/cache from 5 to 6 (#1402)

Author: dependabot[bot]

.github/workflows/security-audit.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: ~/.cargo/bin
           key: ${{ runner.os }}-cargo-audit-v0.22.0