HYDRA-1458 : Fix whitespace

Author: debloip-adsk

doc/CHANGELOG.md

@@ -28,7 +28,6 @@
 * Increase the image comparison threshold [#227](https://github.com/Autodesk/maya-hydra/pull/227)
 * Selection highlighting, picking of MhFootPrint node, with test [#228](https://github.com/Autodesk/maya-hydra/pull/228)
 
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 **Features:**
 * Connect isolate select to Maya UI, and empty isolate selection correctness [#177](https://github.com/Autodesk/maya-hydra/pull/177)
 * Native instancing isolate select support, with test [#186](https://github.com/Autodesk/maya-hydra/pull/186)