chore(deps): update davidanson/markdownlint-cli2 docker tag to v0.19.1 (#738)

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

Author: renovate[bot]

dependencies.Dockerfile

@@ -1,3 +1,3 @@
 # This is a renovate-friendly source of Docker images.
-FROM davidanson/markdownlint-cli2:v0.18.1@sha256:173cb697a255a8a985f2c6a83b4f7a8b3c98f4fb382c71c45f1c52e4d4fed63a AS markdownlint
+FROM davidanson/markdownlint-cli2:v0.19.1@sha256:502fcf316d575d1e663005c8d57688e5bda316f3996caa5715aa384fa1d34810 AS markdownlint
 FROM lycheeverse/lychee:sha-3a09227-alpine@sha256:5853bd7c283663a1200dbb15924a5047f8d4c50adfa7a4c212a94f04bbac831c AS lychee