.github: fix ANDROID_NDK_ROOT

.github/workflows/main.yml

@@ -9,17 +9,17 @@ jobs:
         - uses: actions/checkout@v1
         - name: android-arm-make-debug
           run: |
-            export ANDROID_NDK_ROOT=$ANDROID_HOME/ndk-bundle
+            export ANDROID_NDK_ROOT=$ANDROID_HOME/ndk/20.1.5948944
             export ANDROID_NDK_ABI=23
             make android-arm-debug MAKE_JOBS=2
         - name: android-arm-make-development
           run: |
-            export ANDROID_NDK_ROOT=$ANDROID_HOME/ndk-bundle
+            export ANDROID_NDK_ROOT=$ANDROID_HOME/ndk/20.1.5948944
             export ANDROID_NDK_ABI=23
             make android-arm-development MAKE_JOBS=2
         - name: android-arm-make-release
           run: |
-            export ANDROID_NDK_ROOT=$ANDROID_HOME/ndk-bundle
+            export ANDROID_NDK_ROOT=$ANDROID_HOME/ndk/20.1.5948944
             export ANDROID_NDK_ABI=23
             make android-arm-release MAKE_JOBS=2
     linux: