Update .github/workflows/check.yml

Co-authored-by: Dai MIKURUBE <[email protected]>

.github/workflows/check.yml

@@ -75,13 +75,10 @@ jobs:
       run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "select version();"
     - name: Create database
       run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "create database ci_test;"
-    #
-    # MySQL 8 uses caching_sha2_password mechanism by default.
-    # Connector/J 5.x doesn't support it.
-    #
-    # This part change password mechanism to mysql_native_password.
-    # Remove the following part after update Connector/J
-    #
+    # Workaround to change MySQL's password mechanism to `mysql_native_password`
+    # from `caching_sha2_password` that is the default in MySQL 8 because
+    # Connector/J 5.x does not support `caching_sha2_password`.
+    # TODO: Start testing with `caching_sha2_password` with Connector/J 8.x.
     - name: Show password plugins
       run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "SELECT user, host, plugin FROM mysql.user;"
     - name: Change password mechanism1 (root@localhost)