build: Add clang-format-21 image build (#252)

* build: Add clang-format-21 image build * build: Use questing for versions [17,21]

Author: jidicula

.github/workflows/clang-format-image.yml

@@ -31,10 +31,11 @@ jobs:
  fail-fast: false
  matrix:
  version-pair:
- - {version: "20", ubuntu: "plucky"}
- - {version: "19", ubuntu: "plucky"}
- - {version: "18", ubuntu: "noble"}
- - {version: "17", ubuntu: "noble"}
+ - {version: "21", ubuntu: "questing"}
+ - {version: "20", ubuntu: "questing"}
+ - {version: "19", ubuntu: "questing"}
+ - {version: "18", ubuntu: "questing"}
+ - {version: "17", ubuntu: "questing"}
  - {version: "16", ubuntu: "noble"}
  - {version: "15", ubuntu: "noble"}
  - {version: "14", ubuntu: "noble"}