fix cargo action args

.github/workflows/ci.yaml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [ $default-branch ]
+    branches: [ main ]
   pull_request:
-    branches: [ $default-branch ]
+    branches: [ main ]
   workflow_dispatch:
 
 env:
@@ -27,7 +27,8 @@ jobs:
       - name: rustfmt check
         uses: actions-rs/cargo@v1
         with:
-          command: fmt -- --check
+          command: fmt
+          args: --all -- --check
   check:
     name: check and run tests
     runs-on: ubuntu-latest
@@ -56,7 +57,8 @@ jobs:
       - name: Clippy
         uses: actions-rs/cargo@v1
         with:
-          command: clippy -- -D warnings
+          command: clippy
+          args: -- -D warnings
 
       - name: Test
         uses: actions-rs/cargo@v1