DOC- typo fix and adding correct command for environment deactivation…
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `git diff upstream/master | flake8 --diff`
- [ ] whatsnew entry

… for windows and linux

## [Current coverage](https://codecov.io/gh/pydata/pandas/pull/13413?src=pr) is **84.23%**

> Merging [#13413](https://codecov.io/gh/pydata/pandas/pull/13413?src=pr) into [master](https://codecov.io/gh/pydata/pandas/branch/master?src=pr) will not change coverage

``` diff
@@             master     #13413   diff @@
==========================================
  Files           138        138          
  Lines         50805      50805          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
  Hits          42796      42796          
  Misses         8009       8009          
  Partials          0          0          
```

> Powered by [Codecov](https://codecov.io?src=pr). Last updated by [3eb4784...6108138](https://codecov.io/gh/pydata/pandas/compare/3eb4784dbf1757f2c3383beff2f70c5da47a93fe...6108138a94334c2863592d6eac3984824ac11b34)
 thanks!
 No Problem :)
