gnucash maint: [github-actions] Update the Ubuntu 18.04 apt repositories before running.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/4f2c66f9 (commit)
	from  https://github.com/Gnucash/gnucash/commit/c1fb613f (commit)



commit 4f2c66f92c45d8360eb895101777a6c5d849d6ee
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Nov 30 10:26:50 2020 -0800

    [github-actions] Update the Ubuntu 18.04 apt repositories before running.



Summary of changes:
 .github/workflows/ci-tests.yml | 1 +
 1 file changed, 1 insertion(+)