chore: update CHANGELOG for v0.11.18

[pyansys-ci-bot]

Update CHANGELOG for v0.11.18 and remove .md files in doc/changelog.d.

Caution

Do not merge this pull request until the release has been successfully made.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 19db37c1	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (19db37c)	Report Missing	Report Missing	Report Missing
Head commit (bdbd9eb)	2537	2193	86.44%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1179)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.44%. Comparing base (19db4e2) to head (bdbd9eb).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1179   +/-   ##
=======================================
  Coverage   86.44%   86.44%           
=======================================
  Files          39       39           
  Lines        2537     2537           
=======================================
  Hits         2193     2193           
  Misses        344      344           

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