chore(deps): update mysql docker tag to v9

| datasource | package | from | to  |
| ---------- | ------- | ---- | --- |
| docker     | mysql   | 8.0  | 9.4 |


Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       mysql:
-        image: mysql:8.0
+        image: mysql:9.4@sha256:135bc87cce147c3d28cecb9ad270b814cb52805af7ddeea83bfcaf157d05a6b2
         env:
           MYSQL_ALLOW_EMPTY_PASSWORD: yes
           MYSQL_DATABASE: mysql