chore(deps): update node:latest docker digest to 7921bec (#109)

Signed-off-by: Renovate Bot <[email protected]>

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

.circleci/config.yml

@@ -10,7 +10,7 @@ node_8: &node_8
 
 node_next: &node_next
   docker:
-    - image: node:latest@sha256:c1b4942420c0f8c47120720078f71d073dda9f3ae58acf99a7b3037fe2bca457
+    - image: node:latest@sha256:7921beca7c2d5ba543c52a0baa5e6368a282c0dfaf6a8d12115026cde4dcb556
 
 test_plan: &test_plan
   steps: