fix: rename misleading fallback test for PathReplacer workspaceFolder

Rename test to clarify intent: without workspaceFolder parameter,
${workspaceFolder} falls back to cwd, producing duplicated path
segments in monorepo setups. This documents the known limitation
that the workspaceFolder parameter was introduced to fix.

Author: recca0120

packages/phpunit/src/Configuration/PathReplacer.test.ts

@@ -332,7 +332,7 @@ describe('PathReplacer', () => {
             expect(result).not.toContain('apps/api/apps/api');
         });
 
-        it(`falls back to cwd when workspaceFolder is not provided`, () => {
+        it(`produces duplicated path segments when workspaceFolder is not provided`, () => {
             const pathReplacer = new PathReplacer({ cwd });
 
             expect(