Bump zizmorcore/zizmor-action from 0.5.5 to 0.5.6

Bumps [zizmorcore/zizmor-action](https://github.com/zizmorcore/zizmor-action) from 0.5.5 to 0.5.6.
- [Release notes](https://github.com/zizmorcore/zizmor-action/releases)
- [Commits](https://github.com/zizmorcore/zizmor-action/compare/a16621b09c6db4281f81a93cb393b05dcd7b7165...5f14fd08f7cf1cb1609c1e344975f152c7ee938d)

---
updated-dependencies:
- dependency-name: zizmorcore/zizmor-action
  dependency-version: 0.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/dart.yml

diff --git a/.github/workflows/dart.yml b/.github/workflows/dart.yml
index 7c35fba..4ca7b08 100644
--- a/.github/workflows/dart.yml
+++ b/.github/workflows/dart.yml
@@ -20,7 +20,7 @@
         with:
           persist-credentials: false
       - name: Run zizmor 🌈
-        uses: zizmorcore/zizmor-action@a16621b09c6db4281f81a93cb393b05dcd7b7165 # v0.5.5
+        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
 
   analyze:
     strategy: