Update rules description

Author: gretard

src/sonar-sql-plugin/src/main/java/org/antlr/sql/dialects/rules/BaseRules.java

@@ -428,7 +428,7 @@ public Rule getWhereWithOrVsUnionRule() {
 		r.setDebtRemediationFunctionCoefficient("3min");
 		r.setName("OR verb is used in a WHERE clause");
 		RuleImplementation rImpl = new RuleImplementation();
-		rImpl.setRuleViolationMessage("Consider using UNION ALL instead of OR in a WHERE clause.");
+		rImpl.setRuleViolationMessage("Consider using UNION/UNION ALL instead of OR in a WHERE clause.");
 		r.setRuleImplementation(rImpl);
 		rImpl.getCompliantRulesCodeExamples().getRuleCodeExample()
 				.add("SELECT name, surname, count from dbo.test where name = 'or' and surname = 'TestOR';");