Typo in line 71 in `README.md` file

**Describe the bug**
There is a typo in line 71 in the `README.md` file in the root directory.

```
1. **Use PowerShell?**:
```
I might have made this mistake in the last pull request, #2687 and I am extremely sorry for that.

I am adding another small pull request just to resolve that.


**Expected behavior**
It should be

```
1. **Use PowerShell**:
```
The `?` should be removed.

