revert previous change

.forgejo/workflows/buildcheck.yaml

@@ -3,25 +3,39 @@ run-name: ${{ github.actor }} is testing
 on: [push]
 jobs:
   docker-check:
-    runs-on: rust
+    runs-on: docker
     steps:
       - name: Grab misc. dependencies
         run: |
           apt update && apt install -y librust-libudev-sys-dev build-essential
       - name: Check out repository code
         uses: actions/checkout@v3
+      - name: Grab Rust toolchain
+        uses: https://github.com/actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          target: aarch64-unknown-linux-gnu
+          override: true
       - name: Run check
         uses: https://github.com/actions-rs/cargo@v1
         with:
           command: check
   docker-build:
-    runs-on: rust
+    runs-on: docker
     steps:
       - name: Grab misc. dependencies
         run: |
           apt update && apt install -y librust-libudev-sys-dev build-essential
       - name: Check out repository code
         uses: actions/checkout@v3
+      - name: Grab Rust toolchain
+        uses: https://github.com/actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          target: aarch64-unknown-linux-gnu
+          override: true
       - name: Run check
         uses: https://github.com/actions-rs/cargo@v1
         with: