Adding pdthummar to CodeOwners file

[vrdmr]

Description

As described in the title.

Fixes #

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[vrdmr]

FYI @pdthummar

[codecov]

Codecov Report

Merging #995 (ba30ec2) into dev (0178bde) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #995   +/-   ##
=======================================
  Coverage   82.76%   82.76%           
=======================================
  Files          33       33           
  Lines        1677     1677           
  Branches      267      267           
=======================================
  Hits         1388     1388           
  Misses        226      226           
  Partials       63       63           

Flag	Coverage Δ
unittests	82.76% <ø> (ø)

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