docs: migrate 1.5.0 in readme to 1.7.0 (#2914)

Author: Pengzna

README.md

@@ -47,7 +47,7 @@ the [README](hugegraph-server/hugegraph-dist/docker/README.md) for more details.
 
 > Note:
 > 1. The Docker image of HugeGraph is a convenience release, but not **official distribution** artifacts. You can find more details from [ASF Release Distribution Policy](https://infra.apache.org/release-distribution.html#dockerhub).
-> 2. Recommend to use `release tag` (like `1.5.0`/`1.x.0`) for the stable version. Use `latest` tag to experience the newest functions in development.
+> 2. Recommend to use `release tag` (like `1.7.0`/`1.x.0`) for the stable version. Use `latest` tag to experience the newest functions in development.
 
 ### 2. Download
 

hugegraph-server/hugegraph-dist/docker/README.md

@@ -4,7 +4,7 @@
 >
 > 1. The docker image of hugegraph is a convenience release, not official distribution artifacts from ASF. You can find more details from [ASF Release Distribution Policy](https://infra.apache.org/release-distribution.html#dockerhub).
 >
-> 2. Recommend to use `release tag` (like `1.3.0`/`1.5.0`) for the stable version. Use `latest` tag to experience the newest functions in development.
+> 2. Recommend to use `release tag` (like `1.5.0`/`1.7.0`) for the stable version. Use `latest` tag to experience the newest functions in development.
 
 ## 1. Deploy