Update README.md

Removed beta terminology for parallel backup feature since this has now been in place for a while.

Author: shcorbett

README.md

@@ -3,7 +3,7 @@
 This repository includes backup and recovery utilities for
 [GitHub Enterprise Server][1].
 
-**UPDATE**: The new parallel backup and restore beta feature will require [GNU awk](https://www.gnu.org/software/gawk) and [moreutils](https://joeyh.name/code/moreutils) to be installed. Note that on some distributions/platforms, the `moreutils-parallel` package is separate from `moreutils` and must be installed on its own.
+**Note**: The parallel backup and restore feature will require [GNU awk](https://www.gnu.org/software/gawk) and [moreutils](https://joeyh.name/code/moreutils) to be installed. Note that on some distributions/platforms, the `moreutils-parallel` package is separate from `moreutils` and must be installed on its own.
 
 **Note**: the [GitHub Enterprise Server version requirements][2] have
 changed starting with Backup Utilities v2.13.0, released on 27 March 2018.