CI workflow to ignore markdown changes #433

Job	Run time
Julia 1 - macOS-latest - x64 - pull_request	15m 33s
Julia 1 - windows-latest - x64 - pull_request	11m 41s
Julia nightly - ubuntu-latest - x64 - pull_request	8m 59s
Julia 1 - ubuntu-latest - x64 - pull_request	10m 50s
Julia pre - ubuntu-latest - x64 - pull_request	9m 29s
Julia pre - macOS-latest - x64 - pull_request	11m 44s
Julia pre - windows-latest - x64 - pull_request	11m 19s
Julia nightly - windows-latest - x64 - pull_request	10m 55s
Julia lts - ubuntu-latest - x64 - pull_request	8m 43s
Julia lts - windows-latest - x64 - pull_request	10m 40s
Julia lts - macOS-latest - x64 - pull_request	9m 7s
Julia nightly - macOS-latest - x64 - pull_request	10m 17s
	2h 9m 17s

Provide feedback