[actions] don't use external actions

.gitea/workflows/build-sporq.yaml

@@ -8,12 +8,18 @@ jobs:
     container:
       image: ghcr.io/qmk/qmk_base_container:latest@sha256:d27f995fd142681b273d95dc150d3a3683b6b1884b4c46f70c00a1a991d0e11e
     steps:
-      - uses: actions/setup-node@v3
-        with:
-          node-version: 18
-
       - name: Set up Git repository
-        uses: actions/checkout@v3
+        run: git clone --depth 1 https://git.sporq.de/sporq/qmk-firmware.git /qmk-firmware
+
+      - name: Install QMK
+        run: python3 -m pip install --user qmk
+
+      - name: Set up QMK
+        run: qmk setup
+        environment:
+          PATH: /root/.local/bin
 
       - name: Build sporq keymap for splitkb/aurora/corne/rev1
-        run: qmk compile -kb splitkb/aurora/corne/rev1 -km sporq
+        run: cd /qmk-firmware; make splitkb/aurora/corne/rev1:sporq:dfu-util
+        environment:
+          PATH: /root/.local/bin