workflows: Use 18.04 for arduino-ci
The workflow doesn't ask for a specific version of Ubuntu, but when
it gets 20.04, ci-arduino causes a failure because it requests installation of
a specific version of llvm that is not available in 20.04.
@@ -9,7 +9,7 @@ jobs:
matrix:
arduino-platform: ["uno", "nrf52832", "cpx_ada", "pyportal", "protrinket_3v", "protrinket_5v", "metro_m0", "esp8266", "esp32", "trinket_3v", "trinket_5v", "gemma", "flora", "feather32u4", "feather_m0_express", "gemma_m0", "trinket_m0", "hallowing_m0", "monster_m4sk", "hallowing_m4", "neotrellis_m4", "pybadge", "cpb", "cpc"]
- runs-on: ubuntu-latest
+ runs-on: ubuntu-18.04
steps:
- uses: actions/setup-python@v2
