chore: invoke hurl within tests/ directory in order to use version installed by mise

Correction for 1db016b commit.

Author: php-coder

Diff for: .github/workflows/integration-tests.yml

@@ -97,15 +97,17 @@ jobs:
           MISE_DISABLE_TOOLS: go,node,python
 
       - name: Show Hurl version
+        working-directory: tests
         run: hurl --version
 
       - name: Run integration tests
+        working-directory: tests
         run: >-
           hurl \
             --error-format long \
             --variable SERVER_URL=http://127.0.0.1:${{ matrix.application-port }} \
             --variable skip_500_error_testing=${{ matrix.skip_500_error_testing }} \
-            --test tests/
+            --test
 
       - name: Show application logs
         if: failure()