Release builds need --release

Author: thejpster

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install flip-link
         run: cd / && cargo install flip-link
       - name: Build
-        run: cargo build --verbose --target=thumbv6m-none-eabi
+        run: cargo build --release --target=thumbv6m-none-eabi
       - name: Get Branch Name
         id: branch_name
         run: |