Merge pull request #2219 from wojiushixiaobai/docs

[Update]更新

docs/faq_upgrade.rst

@@ -49,7 +49,6 @@
     # 依赖安装
     $ source /opt/py3/bin/activate
     $ yum -y install $(cat /opt/jumpserver/requirements/rpm_requirements.txt)
-    $ pip install --upgrade pip setuptools
     $ pip install -r /opt/jumpserver/requirements/requirements.txt
 
     # 重新创建一个数据库

docs/upgrade.rst

@@ -254,8 +254,8 @@
 .. code-block:: shell
 
     $ cd /opt/jumpserver
-    $ git checkout master
-    $ git pull
+    $ git fetch
+    $ git checkout 1.4.5
     $ git clean -df  # 清除未跟踪文件, 请一定要做好备份后再操作此步骤
     $ git reset --hard  # 还原所有修改, 请一定要做好备份后再操作此步骤