Install Rust directly in Apple workflow

.forgejo/workflows/build-apple.yml

@@ -63,10 +63,30 @@ jobs:
           DEVELOPER_DIR="$selected" /usr/bin/xcodebuild -version || true
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: 1.85.0
-          targets: ${{ matrix.rust-targets }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          export RUSTUP_HOME="${HOME}/.rustup"
+          export CARGO_HOME="${HOME}/.cargo"
+
+          if ! command -v rustup >/dev/null 2>&1; then
+            curl --proto '=https' --tlsv1.2 -fsSL https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.85.0
+          else
+            rustup set profile minimal
+            rustup toolchain install 1.85.0
+            rustup default 1.85.0
+          fi
+
+          echo "${CARGO_HOME}/bin" >> "${GITHUB_PATH}"
+          . "${CARGO_HOME}/env"
+
+          targets='${{ matrix.rust-targets }}'
+          for target in ${targets//,/ }; do
+            rustup target add "${target}"
+          done
+
+          rustc --version
+          cargo --version
 
       - name: Install Protobuf
         shell: bash