update Changelog

CHANGELOG.md

-#### Version 0.8.17
+### pyBOAT 0.8.17
 
 - Fixed crashes during batch analysis with thresholded ridges
 - Warning and on-the-fly interpolation of non-contiguous missing values (NaNs)
 
-#### Version 0.8.16
+### pyBOAT 0.8.16
 
 - added the pyBOAT icon
 - changed version numbering scheme
 
-#### Version 0.8.1.5
+### pyBOAT 0.8.1.5
 
 - fixed Fourier spectra crash
 - changed plotting style for short signals
 
-### Version 0.8.1
+### pyBOAT 0.8.1
 
 - fixed COI on thresholded ridge
 - improved summary statistics
 
-### Version 0.8
+### pyBOAT 0.8
 
 - added batch processing menu
 - summary statistics: time-averaged power and ensemble dynamics
 
-#### Version 0.7.6.1
+### pyBOAT 0.7.6.1
 
 - reworked the SSG, catching missing parameter crashes
 
-### Version 0.7.6
+### pyBOAT 0.7.6
 
 - Added general data import options with optional missing value interpolation
 - Added NaN interpolation to the core module
 
-### Version 0.7.5
+### pyBOAT 0.7.5
 
 - Synthetic Signal Generator, yeah!
 
-### Version 0.7.4
+### pyBOAT 0.7.4
 
 - Amplitude envelope estimation and removal