Update dependency zizmor to v1.18.0 (#12418)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ env:
   # renovate: datasource=github-releases depName=typst/typst versioning=semver
   TYPST_VERSION: 0.14.0
   # renovate: datasource=pypi depName=zizmor
-  ZIZMOR_VERSION: 1.17.0
+  ZIZMOR_VERSION: 1.18.0
 
 jobs:
   changed-files: