[actions] don't use cd

.gitea/workflows/build-sporq.yaml

@@ -13,10 +13,12 @@ jobs:
       - run: echo "${HOME}/.local/bin" >> $GITHUB_PATH
 
       - name: Set up Git repository
-        run: git clone --depth 1 https://git.sporq.de/sporq/qmk-firmware.git; cd qmk-firmware
+        run: git clone --depth 1 https://git.sporq.de/sporq/qmk-firmware.git qmk-firmware
 
       - name: Set up QMK
+        working-directory: .qmk-firmware
         run: qmk setup --yes
 
       - name: Build sporq keymap for splitkb/aurora/corne/rev1
+        working-directory: .qmk-firmware
         run: qmk compile -kb splitkb/aurora/corne/rev1 -km sporq