Free up disk space before checkout

.github/workflows/build-openwrt.yml

@@ -88,6 +88,14 @@ jobs:
       BUILD_TARGET: ${{matrix.target}}
 
     steps:
+    - name: Maximize build space
+      uses: easimon/maximize-build-space@master
+      with:
+        remove-dotnet: 'true'
+        remove-android: 'true'
+        remove-haskell: 'true'
+        remove-codeql: 'true'
+
     - name: Checkout
       uses: actions/checkout@v3
       with:
@@ -105,9 +113,10 @@ jobs:
 
       # https://github.com/docker/setup-qemu-action
     - name: Set up QEMU
-      id: buildx-qemy
+      id: buildx-qemu
       if: env.SKIP_TARGET == '0'
       uses: docker/setup-qemu-action@v2
+
       # https://github.com/docker/setup-buildx-action
     - name: Set up Docker Buildx
       id: buildx