ci(build): use latest over explicit image version

These jobs should be safe to just use the latest as there's not many
moving parts as opposed to `test.yml`.

.github/workflows/build.yml

@@ -23,7 +23,7 @@ env:
 jobs:
  old-cmake:
  name: Test oldest supported cmake
- runs-on: ubuntu-22.04
+ runs-on: ubuntu-latest
  timeout-minutes: 15
  env:
  CMAKE_URL: 'https://cmake.org/files/v3.13/cmake-3.13.0-Linux-x86_64.sh'
@@ -56,7 +56,7 @@ jobs:
 
  use-existing-src:
  name: Test USE_EXISTING_SRC_DIR=ON builds with no network access
- runs-on: ubuntu-22.04
+ runs-on: ubuntu-latest
  steps:
  - uses: actions/checkout@v4
  - uses: ./.github/actions/setup

MAINTAIN.md

@@ -215,13 +215,12 @@ https://github.com/neovim/neovim-backup
  * For special-purpose jobs where the runner version doesn't really matter,
  prefer `-latest` tags so we don't need to manually bump the versions. An
  example of a special-purpose workflow is `labeler_pr.yml`.
- * For our testing jobs, which are in `test.yml` and `build.yml`, prefer to
- use the latest stable (i.e. non-beta) version explicitly. Avoid using the
- `-latest` tags here as it makes it difficult to determine from an
- unrelated PR if a failure is due to the PR itself or due to GitHub bumping
- the `-latest` tag without our knowledge. There's also a high risk that
- automatically bumping the CI versions will fail due to manual work being
- required from experience.
+ * For our testing job `test.yml`, prefer to use the latest stable (i.e.
+ non-beta) version explicitly. Avoid using the `-latest` tags here as it
+ makes it difficult to determine from an unrelated PR if a failure is due
+ to the PR itself or due to GitHub bumping the `-latest` tag without our
+ knowledge. There's also a high risk that automatically bumping the CI
+ versions will fail due to manual work being required from experience.
  * For our release job, which is `release.yml`, prefer to use the oldest
  stable (i.e. non-deprecated) versions available. The reason is that we're
  trying to produce images that work in the broadest number of environments,