[CI] Fix indentation to concatenate the lines and pass the options

.github/workflows/ubuntu.yml

@@ -100,8 +100,8 @@ jobs:
       - name: make ${{ matrix.test_task }}
         run: >-
           $SETARCH make -s ${{ matrix.test_task }}
-            ${TESTS:+TESTS=`echo "$TESTS" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|'`}
-            ${{ contains(matrix.test_task, 'bundle') && '' || 'RUBYOPT=-w' }}
+          ${TESTS:+TESTS=`echo "$TESTS" | sed 's| |$$/ -n!/|g;s|^|-n!/|;s|$|$$/|'`}
+          ${{ contains(matrix.test_task, 'bundle') && '' || 'RUBYOPT=-w' }}
         timeout-minutes: 40
         env:
           RUBY_TESTOPTS: '-q --tty=no'