[skip ci] Fix script bug (#13401)

Signed-off-by: Nyhmo <yihua.mo@zilliz.com>

scripts/README.md

@@ -69,8 +69,8 @@ $ docker-compose up -d
 
 Start milvus cluster:
 ```shell
-$ cd [milvus project path]/scripts
-$ start_cluster.sh
+$ cd [milvus project path]
+$ ./scripts/start_cluster.sh
 ```
 
 ## Run unittest

scripts/start_cluster.sh

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cd ..
-
 echo "Starting rootcoord..."
 nohup ./bin/milvus run rootcoord > /tmp/rootcoord.log 2>&1 &
 

scripts/start_standalone.sh

@@ -14,7 +14,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cd ..
-
 echo "Starting standalone..."
 nohup ./bin/milvus run standalone > /tmp/standalone.log 2>&1 &