fix: replace deprecated actions-rs/toolchain with dtolnay/rust-toolchain

- Replace actions-rs/toolchain@v1 with dtolnay/rust-toolchain@stable
- Remove deprecated set-output and save-state commands
- Update both health-checks and build-and-render jobs
- Resolves GitHub Actions deprecation warnings

Fixes #1

Author: wilkerHop

.github/workflows/ci.yml

@@ -20,11 +20,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: actions-rs/toolchain@v1
-      with:
-        profile: minimal
-        toolchain: stable
-        override: true
+      uses: dtolnay/rust-toolchain@stable
 
     - name: Cache cargo registry
       uses: actions/cache@v3
@@ -70,11 +66,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: actions-rs/toolchain@v1
-      with:
-        profile: minimal
-        toolchain: stable
-        override: true
+      uses: dtolnay/rust-toolchain@stable
 
     - name: Cache cargo build
       uses: actions/cache@v3