[CI] Fix label check

# Motivation

The label check workflow doesn't seem to work properly.

# Modification

This PR fixes it.

# Result

Proper label checks.

.github/workflows/pull_request_label.yml

@@ -13,4 +13,4 @@ jobs:
             - name: Checkout repository
               uses: actions/checkout@v4
             - name: Check for semver label
-              uses: ".github/actions/pull_request_semver_label_checker/action.yml"
+              uses: ./.github/actions/pull_request_semver_label_checker"