Update '.drone.yml'

.drone.yml

@@ -29,20 +29,19 @@ name: build-qt-macos-app
 platform:
   os: darwin
   arch: amd64
-environment:
-  QT_VERSION: "5.15.2"
 steps:
 - name: test
   commands:
-  - mkdir build
-  - cd build
-  - "export PATH=$PATH:/usr/local/bin"
-  - echo $QT_VERSION
-  - pip3 install -U pip
-  - pip3 install -U aqtinstall
-  - "aqt install-qt mac ios $QT_VERSION -m all"
-  - "./$QT_VERSION/ios/bin/qmake .."
-  - make
+    - mkdir build
+    - cd build
+    - "export PATH=$PATH:/usr/local/bin"
+    - pip3 install -U pip
+    - pip3 install -U aqtinstall
+    - aqt install-qt mac ios $QT_VERSION -m all
+    - ./$QT_VERSION/ios/bin/qmake ..
+    - make
+  environment:
+    QT_VERSION: "5.15.2"
 depends_on:
 - start-github-action