Changelog changes for v0.15.1

[balopat]

cc #1074

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of all the commit author(s), set the cla label to yes (if enabled on your project), and then merge this pull request when appropriate.

[balopat]

cla should be fine, the commit is already merged: #1070

[codecov-io]

Codecov Report

Merging #1075 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1075   +/-   ##
=======================================
  Coverage   41.85%   41.85%           
=======================================
  Files          72       72           
  Lines        3156     3156           
=======================================
  Hits         1321     1321           
  Misses       1706     1706           
  Partials      129      129

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[nkubala]

a bit strange that the change also shows up here, but LGTM

[googlebot]

CLAs look good, thanks!