Fix Rust target in release workflow

Author: DanielleHuisman

.github/workflows/release.yml

@@ -40,9 +40,7 @@ jobs:
             - uses: actions/checkout@v4
 
             - name: Set up Rust toolchain
-              env:
-                  TARGET: ${{ matrix.target }}
-              run: rustup toolchain install stable --no-self-update --profile minimal --component rust-std-$TARGET
+              run: rustup toolchain install stable --no-self-update --profile minimal --component rust-std-${{ matrix.target }}
 
             - name: Set up Rust cache
               uses: swatinem/rust-cache@v2