Build on stable, with HF

Author: Jonathan Pallant

.github/workflows/build.yml

@@ -11,12 +11,12 @@ jobs:
     strategy:
       matrix:
         target:
-          - thumbv8m.main-none-eabi
+          - thumbv8m.main-none-eabihf
     steps:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: stable
           target: ${{ matrix.target }}
           override: true
       - uses: actions-rs/cargo@v1