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docs: update changelog for 1.8.0 #240

Job	Run time
Static analysis	25s
Coding standards	19s
Code coverage	21s
Unit tests (7.4, macos-latest, highest)	44s
Unit tests (7.4, windows-latest, highest)	46s
Unit tests (7.4, windows-latest, lowest)	50s
Unit tests (8.1, ubuntu-latest, lowest)	17s
Unit tests (7.4, ubuntu-latest, highest)	15s
Unit tests (8.0, windows-latest, lowest)	48s
Unit tests (8.0, ubuntu-latest, lowest)	18s
Unit tests (8.1, ubuntu-latest, highest)	16s
Unit tests (8.1, windows-latest, lowest)	44s
Unit tests (7.4, ubuntu-latest, lowest)	14s
Unit tests (8.0, ubuntu-latest, highest)	19s
Unit tests (8.1, macos-latest, highest)	1m 0s
Unit tests (8.0, windows-latest, highest)	47s
Unit tests (8.0, macos-latest, lowest)	1m 5s
Unit tests (8.0, macos-latest, highest)	53s
Unit tests (8.1, macos-latest, lowest)	1m 47s
Unit tests (8.1, windows-latest, highest)	48s
Unit tests (7.4, macos-latest, lowest)	1m 17s
	14m 13s

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