ci: pin ubuntu OS to 22.04. (#3659) #10537

Job	Run time
Check library vulnerabilities	50s
Build remote test matrix	0s
Build test matrix for minimal and local	0s
Documentation style doc	19s
Documentation style examples	10s
Check the name of the pull-request	0s
${{ matrix.os }} \| Py ${{ matrix.python-version }} \| Rel ${{ matrix.should-release }}	0s
Julia ${{ matrix.julia-version }} \| ${{ matrix.os }}	0s
Local: Build & test on Windows	0s
Update CHANGELOG (on release)	0s
Remote: ${{ matrix.mapdl-version }}	0s
Local: ${{ matrix.mapdl-version }}	0s
Local-min: ${{ matrix.mapdl-version }}	0s
Local-min-console: ${{ matrix.mapdl-version }}	0s
Build documentation	11m 39s
Upload dev documentation	5m 37s
Package library	0s
Notify failed build	0s
Release project	0s
Upload release documentation	0s
	18m 35s

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