Bump DavidAnson/markdownlint-cli2-action from 18.0.0 to 19.0.0 (#814)

Author: dependabot[bot]

.github/workflows/lint.yml

@@ -39,7 +39,7 @@ jobs:
         args: -color
 
     - name: Lint markdown
-      uses: DavidAnson/markdownlint-cli2-action@eb5ca3ab411449c66620fe7f1b3c9e10547144b0 # v18.0.0
+      uses: DavidAnson/markdownlint-cli2-action@a23dae216ce3fee4db69da41fed90d2a4af801cf # v19.0.0
       with:
         config: '.markdownlint.json'
         globs: |