Update CHANGELOG.md

Author: aroraharsh23

CHANGELOG.md

@@ -28,7 +28,7 @@ All notable changes to this project will be documented in this file.
  - Error handling modification
 
 
-## [1.4.7] - 2021-01-28
+## [1.4.7] - 2021-02-08
 ### Added
  - Added adc_probe_success metric to indicate successful/Failed scrape
  - Added new metric "citrixadc_throughput_tx_mbits_rate"