github: action: Fix warnings

.github/workflows/action.yml

@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
-    - uses: actions-rs/toolchain@v1.0.6
-      with:
-        toolchain: stable
-        override: true
+    - name: Install Rust
+      run: |
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain stable -y
+        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
     - name: Check Type
       run: cargo fmt -- --check
     - name: Run internal tests
@@ -23,10 +23,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
-    - uses: actions-rs/toolchain@v1.0.6
-      with:
-        toolchain: stable
-        override: true
+    - name: Install Rust
+      run: |
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain stable -y
+        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
     - name: Build docs
       run: cargo doc
     - name: Deploy
@@ -94,11 +94,10 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: recursive
-      - name: Setup Rust toolchain
-        uses: actions-rs/toolchain@v1.0.7
-        with:
-          toolchain: stable
-          override: true
+      - name: Install Rust
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain stable -y
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
       - name: Install cargo-bump
         run: cargo install cargo-bump --force
       - name: Modify version with tag