fix: Remove extra whitespace in README.md

Updated to  perform 6.4.0 prerelease.

Author: dlabaj

README.md

@@ -1,7 +1,7 @@
 # PatternFly React Component Groups
 
 This repo contains a set of opinionated react component groups used to standardize functionality and look and feel across products. The components are based on PatternFly with some additional functionality.
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+
 ### Branches
 
 `main` - PatternFly 6 implementation