Bump DavidAnson/markdownlint-cli2-action from 16 to 20

Bumps [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action) from 16 to 20.
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@v16...v20)

---
updated-dependencies:
- dependency-name: DavidAnson/markdownlint-cli2-action
  dependency-version: '20'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -10,8 +10,8 @@ jobs:
     steps:
       - uses: 1Password/load-secrets-action@581a835fb51b8e7ec56b71cf2ffddd7e68bb25e0
       - uses: ana06/get-changed-files@v2.3.0
-      - uses: DavidAnson/markdownlint-cli2-action@b4c9feab76d8025d1e83c653fa3990936df0e6c8
-      - uses: DavidAnson/markdownlint-cli2-action@v16
+      - uses: DavidAnson/markdownlint-cli2-action@992badcdf24e3b8eb7e87ff9287fe931bcb00c6e
+      - uses: DavidAnson/markdownlint-cli2-action@v20
       - uses: JamesIves/github-pages-deploy-action@881db5376404c5c8d621010bcbec0310b58d5e29
       - uses: JamesIves/github-pages-deploy-action@v4.6.8
       - uses: JustinBeckwith/linkinator-action@3d5ba091319fa7b0ac14703761eebb7d100e6f6d