Fix test cases. "to" is a PII context keyword in MLDetector.PII_PREV_KEYWORDS .

Author: Sushegaad

src/test/java/com/semanticprivacyguard/CustomPatternTest.java

@@ -115,7 +115,7 @@ void customPattern_employeeId_detected() {
             .build();
         SemanticPrivacyGuard spg = SemanticPrivacyGuard.create(config);
 
-        RedactionResult result = spg.redact("Assigned to EMP-042731 for review.");
+        RedactionResult result = spg.redact("Task EMP-042731 is pending.");
 
         assertTrue(result.getRedactedText().contains("[PII_1]"),
             "Employee ID should be tokenised to [PII_1]");