Move rustfmt to seperateworkflow

.github/workflows/check.yml

@@ -12,15 +12,11 @@ jobs:
           target: thumbv6m-none-eabi
           override: true
           profile: minimal
-          components: rustfmt, clippy
+          components: clippy
       - uses: actions-rs/cargo@v1
         with:
           command: check
           args: --workspace
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: -- --check
       - uses: actions-rs/cargo@v1
         with:
           command: clippy

.github/workflows/rustfmt.yml

@@ -0,0 +1,19 @@
+on: [push, pull_request]
+name: Code formatting check
+jobs:
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: thumbv6m-none-eabi
+          override: true
+          profile: minimal
+          components: rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: -- --check