doc: update using s3 storage example

docs/how-tos/backup-to-s3.md

@@ -37,6 +37,7 @@ services:
       - AWS_SECRET_KEY=xxxxx
       ## In case you are using S3 alternative such as Minio and your Minio instance is not secured, you change it to true
       - AWS_DISABLE_SSL="false"
+      - AWS_FORCE_PATH_STYLE="false"
  
     # mysql-bkup container must be connected to the same network with your database
     networks:

docs/how-tos/deploy-on-kubernetes.md

@@ -59,6 +59,8 @@ spec:
               value: "xxxx"
             - name: AWS_DISABLE_SSL
               value: "false"
+            - name: AWS_FORCE_PATH_STYLE
+              value: "false"
       restartPolicy: Never
 ```
 

docs/how-tos/restore-from-s3.md

@@ -40,6 +40,7 @@ services:
       - AWS_SECRET_KEY=xxxxx
       ## In case you are using S3 alternative such as Minio and your Minio instance is not secured, you change it to true
       - AWS_DISABLE_SSL="false"
+      - AWS_FORCE_PATH_STYLE="false"
     # mysql-bkup container must be connected to the same network with your database
     networks:
       - web