Remove git stash

[aubertc]

I have added a git stash:

princomp.github.io/.github/workflows/build_and_deploy.yaml

Line 84 in 7186004

git stash

to fix the issue exhibited at

https://github.com/princomp/princomp.github.io/actions/runs/12701368246/job/35405751457

 error: Your local changes to the following files would be overwritten by checkout:
	source/img/activity_diag_month.svg
	source/img/activity_diag_vote_if_else.svg
	source/img/conversions.svg
	source/img/flowchart.svg
Please commit your changes or stash them before you switch branches.
Aborting

A proper solution would be to understand why those files were updated and to fix this.

[aubertc]

The Build & deploy (no fetch) #48 had the same issue:

Run git checkout quartz
error: Your local changes to the following files would be overwritten by checkout:
	source/img/activity_diag_vote_if_else.svg
	source/img/conversions.svg
	source/img/flowchart.svg
Please commit your changes or stash them before you switch branches.
Aborting
Error: Process completed with exit code 1.

so I similarly added a "git stash" with f84338b

Both should be removed, eventually…