Update ActivityAndCover.cs

[towsey]

Issue #331 Change bug in calculation of index: activity

Purpose is to fix bug in calculation of Activity acoustic index.

Changes

Changed one line of code.

Final Checklist

[codecov]

Codecov Report

Merging #350 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #350      +/-   ##
==========================================
+ Coverage   29.30%   29.32%   +0.02%     
==========================================
  Files         475      475              
  Lines       68794    68794              
==========================================
+ Hits        20158    20173      +15     
+ Misses      48636    48621      -15     

Impacted Files	Coverage Δ
src/AudioAnalysisTools/ActivityAndCover.cs	94.78% <100.00%> (ø)
src/Acoustics.Shared/Logging/Logging.cs	95.15% <0.00%> (+0.44%)	⬆️
src/Acoustics.Shared/ImageSharp/Drawing.cs	85.07% <0.00%> (+1.49%)	⬆️
src/Acoustics.Shared/AppConfigHelper.cs	83.45% <0.00%> (+3.59%)	⬆️
src/AnalysisPrograms/CheckEnvironment.cs	58.18% <0.00%> (+12.72%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 115b610...c6c4411. Read the comment docs.