build(deps): bump the docker-dependecies group with 1 update

Bumps the docker-dependecies group with 1 update: node.


Updates `node` from 21.5.0 to 21.6.1

---
updated-dependencies:
- dependency-name: node
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-dependecies
...

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

dockerfile

@@ -1,4 +1,4 @@
-FROM node:21.5.0
+FROM node:21.6.1
 RUN mkdir -p /usr/hullcss/src
 WORKDIR /usr/hullcss/src
 COPY package.json /usr/hullcss/src