Typo in the documentation

## In what area(s)?

> /area runtime

> /area operator

> /area placement

/area docs

> /area test-and-release

## What version of Dapr?

1.1.x
> 1.0.x
> edge: output of `git describe --dirty`

## Expected Behavior

In the section 'Arguments and Annotations' the parameter `app-max-concurrency` should havethe following description:

Limit the concurrency of your application. A valid value is any number larger than 0. Default value: -1, meaning no concurrency limit is imposed.

## Actual Behavior

The current description is
```
Limit the concurrency of your application. A valid value is any number larger than 0. Default value: -1, meaning no concurrency.
```

which leads to understanding that the default limits to just one requests at a time.

## Steps to Reproduce the Problem

## Release Note

RELEASE NOTE: