Update nightly.yml

Author: opensource-krzysztof

.github/workflows/nightly.yml

@@ -135,9 +135,10 @@ jobs:
 
     - name: NMake Makefiles
       if: matrix.generator == 'Unix Makefiles'
-      run: cmake -G "Unix Makefiles"
       env:
         UMF_TESTS_FAIL_ON_SKIP: ON
+      run: cmake -G "Unix Makefiles"
+