tools: use ubuntu-slim runner in meta GitHub Actions

[bnb]

This PR updates a number of runners that do simple-ish meta work (think: labeling PRs, checking activity, sending Slack notifications) to use the ubuntu-slim runner rather than ubuntu-latest. If they all still work, this should reduce the amount of compute that we're using over time - less energy, less allocation of resources - for simple tasks that don't really need it.

[nodejs-github-bot]

Review requested:

• @nodejs/actions

[nodejs-github-bot]

Commit Queue failed

- Loading data for nodejs/node/pull/61663
✔  Done loading data for nodejs/node/pull/61663
----------------------------------- PR info ------------------------------------
Title      tools: use ubuntu-slim runner in meta GitHub Actions (#61663)
Author     Tierney Cyren <hello@bnb.im> (@bnb)
Branch     bnb:bnb/use-ubuntu-slim-where-appropriate -> nodejs:main
Labels     meta, author ready, lts-watch-v20.x, lts-watch-v22.x
Commits    2
 - tools: use ubuntu-slim runner in meta GitHub Actions
 - Merge branch 'main' into bnb/use-ubuntu-slim-where-appropriate
Committers 2
 - Tierney Cyren <hello@bnb.im>
 - GitHub <noreply@github.com>
PR-URL: https://github.com/nodejs/node/pull/61663
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
------------------------------ Generated metadata ------------------------------
PR-URL: https://github.com/nodejs/node/pull/61663
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
--------------------------------------------------------------------------------
   ℹ  This PR was created on Tue, 03 Feb 2026 21:17:20 GMT
   ✔  Approvals: 4
   ✔  - Antoine du Hamel (@aduh95) (TSC): https://github.com/nodejs/node/pull/61663#pullrequestreview-3747853927
   ✔  - Richard Lau (@richardlau) (TSC): https://github.com/nodejs/node/pull/61663#pullrequestreview-3747868952
   ✔  - Luigi Pinca (@lpinca): https://github.com/nodejs/node/pull/61663#pullrequestreview-3749383289
   ✔  - Colin Ihrig (@cjihrig): https://github.com/nodejs/node/pull/61663#pullrequestreview-3751690674
   ✔  Last GitHub CI successful
   ℹ  Green GitHub CI is sufficient
--------------------------------------------------------------------------------
   ✔  No git cherry-pick in progress
   ✔  No git am in progress
   ✔  No git rebase in progress
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- Bringing origin/main up to date...
From https://github.com/nodejs/node
 * branch                  main       -> FETCH_HEAD
✔  origin/main is now up-to-date
- Downloading patch for 61663
From https://github.com/nodejs/node
 * branch                  refs/pull/61663/merge -> FETCH_HEAD
✔  Fetched commits as 0da120f879f8..2a0fb7288986
--------------------------------------------------------------------------------
Auto-merging .github/workflows/close-stale-feature-requests.yml
Auto-merging .github/workflows/close-stalled.yml
Auto-merging .github/workflows/commit-lint.yml
Auto-merging .github/workflows/commit-queue.yml
Auto-merging .github/workflows/find-inactive-collaborators.yml
Auto-merging .github/workflows/find-inactive-tsc.yml
Auto-merging .github/workflows/label-flaky-test-issue.yml
Auto-merging .github/workflows/notify-on-push.yml
CONFLICT (content): Merge conflict in .github/workflows/notify-on-push.yml
error: could not apply b204054d47... tools: use ubuntu-slim runner in meta GitHub Actions
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config set advice.mergeConflict false"
   ✘  Failed to apply patches

https://github.com/nodejs/node/actions/runs/21742926110

[aduh95]

Landed in ec88813

[Renegade334]

Looks like this has broken Dockerised actions, such as notify-on-push.

Appears the already-containerised nature of ubuntu-slim means that Docker is intentionally unavailable on these runners.