fix: docker-compose documentation about the mysql container configurations (#83)

Fixes halo-dev/halo#2257

see https://hub.docker.com/_/mysql

/kind documentation

```release-note
None
```

Signed-off-by: Ryan Wang <i@ryanc.cc>

docs/getting-started/install/other/docker-compose.md

@@ -92,14 +92,14 @@ description: 使用 Docker Compose 部署 Halo
         restart: on-failure:3
         networks:
           halo_network:
-        command: --default_authentication_plugin=mysql_native_password
+        command: --default-authentication-plugin=mysql_native_password
           --character-set-server=utf8mb4
           --collation-server=utf8mb4_general_ci
           --explicit_defaults_for_timestamp=true
         volumes:
           - /etc/localtime:/etc/localtime:ro
           - ./mysql:/var/lib/mysql
-          - ./mysql/mysqlBackup:/data/mysqlBackup
+          - ./mysqlBackup:/data/mysqlBackup
         ports:
           - "3306:3306"
         environment:
@@ -151,14 +151,14 @@ description: 使用 Docker Compose 部署 Halo
         restart: on-failure:3
         networks:
           halo_network:
-        command: --default_authentication_plugin=mysql_native_password
+        command: --default-authentication-plugin=mysql_native_password
           --character-set-server=utf8mb4
           --collation-server=utf8mb4_general_ci
           --explicit_defaults_for_timestamp=true
         volumes:
           - /etc/localtime:/etc/localtime:ro
           - ./mysql:/var/lib/mysql
-          - ./mysql/mysqlBackup:/data/mysqlBackup
+          - ./mysqlBackup:/data/mysqlBackup
         ports:
           - "3306:3306"
         environment:

versioned_docs/version-1.5.4/getting-started/install/other/docker-compose.md

@@ -92,14 +92,14 @@ description: 使用 Docker Compose 部署 Halo
         restart: on-failure:3
         networks:
           halo_network:
-        command: --default_authentication_plugin=mysql_native_password
+        command: --default-authentication-plugin=mysql_native_password
           --character-set-server=utf8mb4
           --collation-server=utf8mb4_general_ci
           --explicit_defaults_for_timestamp=true
         volumes:
           - /etc/localtime:/etc/localtime:ro
           - ./mysql:/var/lib/mysql
-          - ./mysql/mysqlBackup:/data/mysqlBackup
+          - ./mysqlBackup:/data/mysqlBackup
         ports:
           - "3306:3306"
         environment:
@@ -151,14 +151,14 @@ description: 使用 Docker Compose 部署 Halo
         restart: on-failure:3
         networks:
           halo_network:
-        command: --default_authentication_plugin=mysql_native_password
+        command: --default-authentication-plugin=mysql_native_password
           --character-set-server=utf8mb4
           --collation-server=utf8mb4_general_ci
           --explicit_defaults_for_timestamp=true
         volumes:
           - /etc/localtime:/etc/localtime:ro
           - ./mysql:/var/lib/mysql
-          - ./mysql/mysqlBackup:/data/mysqlBackup
+          - ./mysqlBackup:/data/mysqlBackup
         ports:
           - "3306:3306"
         environment: