bump action deps - remove unmaintained rust thingy

Author: acheong08

.github/workflows/build.yml

@@ -15,13 +15,10 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: actions-rs/toolchain@v1
-      with:
-        toolchain: stable
-        override: true
+      uses: dtolnay/rust-toolchain@stable
 
     - name: Build
       run: cargo build --release --features ${{ matrix.feature }}
@@ -39,7 +36,7 @@ jobs:
         cp target/release/libtiktoken_core.$EXT artifacts/tiktoken_core-$OS-${{ matrix.feature }}.$EXT
 
     - name: Upload artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: tiktoken_core-${{ matrix.os }}-${{ matrix.feature }}
         path: artifacts/tiktoken_core-*.${{ matrix.os == 'ubuntu-latest' && 'so' || 'dylib' }}