fix: update rust toolchain in actions

.github/workflows/rust.yml

@@ -1,10 +1,11 @@
+---
 name: Rust
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 env:
   CARGO_TERM_COLOR: always
@@ -13,29 +14,36 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
-
+      - uses: actions/checkout@v3
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: '1.76.0'
+          profile: minimal
+          override: true
+          target: x86_64-unknown-linux-gnu
+      - name: Build
+        run: cargo build --verbose
+      - name: Run tests
+        run: cargo test --verbose
+
   cargo-clippy:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - name: Run Clippy
         run: cargo clippy --all-targets --all-features
-      
+
   cargo-fmt:
     name: Ensure 'cargo fmt' has been run
     runs-on: ubuntu-20.04
     steps:
-    - uses: dtolnay/rust-toolchain@stable
-      with:
-        components: rustfmt
-    - uses: actions/checkout@v3
-    - run: cargo fmt -- --check
-  
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - uses: actions/checkout@v3
+      - run: cargo fmt -- --check
+
   cargo-audit:
     name: cargo audit
     runs-on: ubuntu-latest