DOC: Page Invalid 404 for Pandas 1.0.5 whatsnew 
#### Location of the documentation

[this should provide the location of the documentation, e.g. "pandas.read_csv" or the URL of the documentation, e.g. "https://dev.pandas.io/docs/reference/api/pandas.read_csv.html"]

Here is the page location https://github.com/pandas-dev/pandas/releases/tag/v1.0.5

```
404 Not Found
nginx/1.10.3 (Ubuntu)
```

**Note**: You can check the latest versions of the docs on `master` [here](https://pandas.pydata.org/docs/dev/).

#### Documentation problem

[this should provide a description of what documentation you believe needs to be fixed/improved]

#### Suggested fix for documentation

[this should explain the suggested fix and **why** it's better than the existing documentation]
