Syntax fix. (#89)

Author: asmorkalov

.github/workflows/OCV-Contrib-PR-5.x-ARM64.yaml

@@ -24,7 +24,7 @@ env:
   OPENCV_TEST_DATA_PATH: '/home/ci/opencv_extra/testdata'
   OPENCV_CONTRIB_DOCKER_WORKDIR: '/home/ci/opencv_contrib'
   DNN_MODELS: '/home/ci/dnn-models'
-  GTEST_FILTER_STRING: '-tracking_GOTURN.GOTURN/*
+  GTEST_FILTER_STRING: '-tracking_GOTURN.GOTURN/*'
   PARALLEL_JOBS: 16
 
 jobs: