upgrade mysql version to v8.0.29

Author: tenzen-y

manifests/v1beta1/components/mysql/mysql.yaml

@@ -21,7 +21,7 @@ spec:
     spec:
       containers:
         - name: katib-mysql
-          image: mysql:8.0.26
+          image: mysql:8.0.29
           args:
             - --datadir
             - /var/lib/mysql/datadir