minor symfony#60918 fix conflicting xargs options (xabbuh)

This PR was merged into the 6.4 branch.

Discussion
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fix conflicting xargs options

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

see https://github.com/symfony/symfony/actions/runs/15902111078/job/44848911141#step:8:10958

Commits
-------

5bcb1d1 fix conflicting xargs options

Author: nicolas-grekas

.github/workflows/unit-tests.yml

@@ -212,7 +212,7 @@ jobs:
               export SYMFONY_REQUIRE=">=$SYMFONY_VERSION"
               git fetch --depth=2 origin $SYMFONY_VERSION
               git checkout -m FETCH_HEAD
-              PATCHED_COMPONENTS=$(echo "$PATCHED_COMPONENTS" | xargs dirname | xargs -n1 -I{} bash -c "[ -e '{}/phpunit.xml.dist' ] && echo '{}'" | sort || true)
+              PATCHED_COMPONENTS=$(echo "$PATCHED_COMPONENTS" | xargs dirname | xargs -I{} bash -c "[ -e '{}/phpunit.xml.dist' ] && echo '{}'" | sort || true)
               if [[ $PATCHED_COMPONENTS ]]; then
                 echo "::group::install phpunit"
                 ./phpunit install