Check if UF2 files are actually zip files, and unzip them

Author: will-v-pi

.github/workflows/test.yml

@@ -86,8 +86,11 @@ jobs:
         run: |
           picotool help
           curl -L https://datasheets.raspberrypi.com/soft/blink.uf2 -o blink.uf2
+          unzip -o blink.uf2 || true
           curl -L https://datasheets.raspberrypi.com/soft/hello_world.uf2 -o hello_world.uf2
+          unzip -o hello_world.uf2 || true
           curl -L https://datasheets.raspberrypi.com/soft/flash_nuke.uf2 -o flash_nuke.uf2
+          unzip -o flash_nuke.uf2 || true
           picotool info -a blink.uf2
           picotool info -a hello_world.uf2
           picotool info -a flash_nuke.uf2