fix: cleanup workflows #4

Job	Run time
Coverage report / test-coverage-internal	1m 43s
Check current version / macos-latest (release)	1m 23s
Check NN version / macos-latest (R 4.3.1, 2023-10-25)	1m 35s
Check current version / windows-latest (release)	2m 12s
Check NN version / macos-latest (R 4.4.1, 2024-08-06)	1m 40s
Check current version / ubuntu-latest (devel)	4m 47s
Check NN version / windows-latest (R 4.3.1, 2023-10-25)	6m 50s
Check current version / ubuntu-latest (release)	1m 57s
Check NN version / windows-latest (R 4.4.1, 2024-08-06)	2m 27s
Check current version / ubuntu-latest (oldrel-1)	2m 0s
Check NN version / ubuntu-latest (R 4.3.1, 2023-10-25)	5m 50s
Check NN version / ubuntu-latest (R 4.4.1, 2024-08-06)	5m 44s
Pkgdown site / pkgdown	2m 20s
Megalinter / MegaLinter	2m 36s
	43m 4s

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