try specifying cwd as arg in nf-test command

Author: kedhammar

.github/workflows/nf-test.yml

@@ -29,4 +29,4 @@ jobs:
           sudo mv nf-test /usr/local/bin/
 
       - name: Run Tests (Shard ${{ matrix.shard }}/${{ strategy.job-total }})
-        run: nf-test test --ci --shard ${{ matrix.shard }}/${{ strategy.job-total }}
+        run: nf-test test --ci --shard ${{ matrix.shard }}/${{ strategy.job-total }} .