chore(deps): update circleci/node:8 docker digest to 9a94cc2

Author: renovate-bot

.circleci/config.yml

@@ -6,7 +6,7 @@ machine:
 jobs:
   build:
     docker:
-      - image: circleci/node:8@sha256:f4b783c5c0fc1443564386cd95da646858504302d2f451ffdf6d0dd3eec1e536
+      - image: circleci/node:8@sha256:9a94cc27a3aff5621842fc2e3dfb93eb110fbc1e97f36d7597191fe16dc455c3
       - image: circleci/mysql:8.0.3@sha256:ea4c062323a944b9152137a62f5b2c8b3d5e235d98af66675871506a1bf6cc6e
     environment:
       - NPM_CONFIG_LOGLEVEL: warn