fixup! No-std support

Author: roblabla

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           - thumbv7m-none-eabi
         include:
           - rust: nightly
-            target: x86_64-unknwon-linux-gnu
+            target: x86_64-unknown-linux-gnu
             args: --all-features
           - target: thumbv7m-none-eabi
             args: --no-default-features --features=alloc