Prepare v1.3.9

[fasmat]

Motivation

Prepares the v1.3 branch for the v1.3.9 release

Description

Just add the release version to the CHANGELOG.md file

Test Plan

n/a

TODO

• Explain motivation or link existing issue(s)
• Test changes and document test plan
• Update documentation as needed
• Update changelog as needed

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (1c7a8a9) 77.3% compared to head (c7d8539) 77.3%.
Report is 4 commits behind head on v1.3.

Files	Patch %	Lines
p2p/host.go	50.0%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.3   #5543     +/-   ##
=======================================
- Coverage   77.3%   77.3%   -0.1%     
=======================================
  Files        261     261             
  Lines      30891   30891             
=======================================
- Hits       23903   23898      -5     
- Misses      5488    5493      +5     
  Partials    1500    1500             

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