CI: ubuntu-20.04 deprecated on 2025-02-01

[jmckenna]

• see announcement
• use ubuntu-latest instead

[mamaar]

This looks good to me 👍

[github-actions]

The backport to branch-1-14 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

To https://github.com/MapServer/mapcache.git
 ! [remote rejected] backport-348-to-branch-1-14 -> backport-348-to-branch-1-14 (refusing to allow a GitHub App to create or update workflow `.github/workflows/build-linux.yml` without `workflows` permission)
error: failed to push some refs to 'https://github.com/MapServer/mapcache.git'

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-branch-1-14 branch-1-14
# Navigate to the new working tree
cd .worktrees/backport-branch-1-14
# Create a new branch
git switch --create backport-348-to-branch-1-14
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 0a566e4e53672429e5097bc4647592b5b1de1b8b,e47e36dd1385523f18366776a8bdf234443ce8d6,187a0e8e6a92ea3e6c40fe09f3cc5175b160a95d,dd1c1f34bce631846abb38758fd67383f1d1cfb1,f042c657a5fceb1375940016dfdf7ad9fc9d43e8
# Push it to GitHub
git push --set-upstream origin backport-348-to-branch-1-14
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-branch-1-14

Then, create a pull request where the base branch is branch-1-14 and the compare/head branch is backport-348-to-branch-1-14.