ci: ledger uses thumbv8m.main-none-eabi

.github/workflows/rust.yml

@@ -86,12 +86,12 @@ jobs:
           profile: minimal
           toolchain: stable
           override: true
-      - run: rustup target add thumbv7em-none-eabihf
+      - run: rustup target add thumbv8m.main-none-eabi
       - uses: Swatinem/rust-cache@v1
       - uses: actions-rs/cargo@v1
         with:
           command: build
-          args: --package poseidon377 --target thumbv7em-none-eabihf --no-default-features
+          args: --package poseidon377 --target thumbv8m.main-none-eabi --no-default-features
 
   # clippy:
   #  name: Clippy