cabal-audit is broken

Hi, running `cabal-audit` fails with ``` cabal-audit failed : listing advisories in /tmp/cabal-audit942863/advisories/published/2024/HSEC-2024-0009.md failed with Advisory structure error: while trying to lookup mandatory key "advisory.date": the path is missing 'hackage' or 'ghc' directory in <top-level> listing advisories in /tmp/cabal-audit942863/advisories/published/2024/HSEC-2024-0007.md failed with Advisory structure error: while trying to lookup mandatory key "advisory.date": the path is missing 'hackage' or 'ghc' directory in <top-level> listing advisories in /tmp/cabal-audit942863/advisories/published/2024/HSEC-2024-0001.md failed with Advisory structure error: while trying to lookup mandatory key "advisory.date": the path is missing 'hackage' or 'ghc' directory in <top-level> .... ``` I am guessing this is likely due to the new layout introduced upstream in this PR https://github.com/haskell/security-advisories/pull/293