Bump node in the docker-dependencies group across 1 directory

Bumps the docker-dependencies group with 1 update in the / directory: node.


Updates `node` from 24.18.1-alpine to 26.8.1-alpine

---
updated-dependencies:
- dependency-name: node
  dependency-version: 26.8.1-alpine
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: docker-dependencies
...

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

Dockerfile.dev

@@ -1,4 +1,4 @@
-FROM node:24.18.1-alpine
+FROM node:26.8.1-alpine
 
 WORKDIR /app