Update mysql:8.4.8 Docker digest to 669b2d8 (#1724)

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

Author: renovate[bot]

docker-compose.yml

@@ -74,7 +74,7 @@ services:
       - activitypub
 
   mysql:
-    image: mysql:8.4.8@sha256:da906917ca4ace3ba55538b7c2ee97a9bc865ef14a4b6920b021f0249d603f3d
+    image: mysql:8.4.8@sha256:669b2d89f3916f5263af230ffa20889a03c7f4bedf58133fe8780466c613f7ae
     environment:
       - MYSQL_ROOT_PASSWORD=root
       - MYSQL_USER=ghost
@@ -216,7 +216,7 @@ services:
   mysql-testing:
     networks:
       - test_network
-    image: mysql:8.4.8@sha256:da906917ca4ace3ba55538b7c2ee97a9bc865ef14a4b6920b021f0249d603f3d
+    image: mysql:8.4.8@sha256:669b2d89f3916f5263af230ffa20889a03c7f4bedf58133fe8780466c613f7ae
     environment:
       - MYSQL_ROOT_PASSWORD=root
       - MYSQL_USER=ghost

jobs/__template__/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   mysql-test:
-    image: mysql:8.4.8@sha256:da906917ca4ace3ba55538b7c2ee97a9bc865ef14a4b6920b021f0249d603f3d
+    image: mysql:8.4.8@sha256:669b2d89f3916f5263af230ffa20889a03c7f4bedf58133fe8780466c613f7ae
     environment:
       MYSQL_ROOT_PASSWORD: root
       MYSQL_DATABASE: __JOB_NAME__

jobs/reconcile-account-topics/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   mysql-test:
-    image: mysql:8.4.8@sha256:da906917ca4ace3ba55538b7c2ee97a9bc865ef14a4b6920b021f0249d603f3d
+    image: mysql:8.4.8@sha256:669b2d89f3916f5263af230ffa20889a03c7f4bedf58133fe8780466c613f7ae
     environment:
       MYSQL_ROOT_PASSWORD: root
       MYSQL_DATABASE: reconcile-account-topics