chore(deps): update mysql docker tag to v8.4 (#534)

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

Author: renovate[bot]

docker-compose.yaml

@@ -69,7 +69,7 @@ services:
       - "27017:27017/tcp"
 
   mysql:
-    image: mysql:8.0@sha256:d0304ed9fdb64a3f6c7ad11a5fb4f13abfc10e6dfa3f288d652e7320c34df7f9
+    image: mysql:8.4@sha256:43bd9764df60666fb2ba2cf8217dd17b3d2414c150005d2fdd07a0cd73d3b7f5
     hostname: mysql
     ports:
       - "3306:3306/tcp"