chore(deps): update node.js to v21.6.0 (#770)

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

Author: renovate[bot]

.circleci/config.yml

@@ -9,7 +9,7 @@ jobs:
   lint:
     description: Checks the code formatting
     docker:
-      - image: cimg/node:21.5.0
+      - image: cimg/node:21.6.0
         environment:
           # we don't need Cypress to check code style
           CYPRESS_INSTALL_BINARY: '0'
@@ -71,7 +71,7 @@ jobs:
   publish:
     description: Publishes the new version of the plugin to NPM
     docker:
-      - image: cimg/node:21.5.0
+      - image: cimg/node:21.6.0
     environment:
       # we don't need Cypress to do the release
       CYPRESS_INSTALL_BINARY: '0'