chore(deps): update dependency ubuntu to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ubuntu	github-runner	major	24.04 → 26.04

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[github-actions]

Where the inference numbers of this branch stand, and where the same
numbers stood on master. A share is a percentage of every object in the
program, and the rungs are the counts it is made of, which come along
because a share on its own is a number to game:

Number	master	branch	change
objects	59714	59714	same
named	88.6	88.6	same
rooted at a void	11.4	11.4	same
nothing known	0.0	0.0	same
depth	70.8	70.8	same
nothing at all	0	0	same
a name rooted at a void	6809	6809	same
a formation, voids still free	8996	8996	same
a formation, nothing left free	31385	31385	same
nothing left to find out	12524	12524	same
rooted at a void nobody fills	480	480	same
rooted at a void the callers fill	6326	6326	same
rooted at a void only an atom fills	3	3	same
answered with a choice	1713	1713	same

They come from eo-runtime/target/eo/ladder.txt, written by the inference goal.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud