:zap: 优化代码，加上final关键字

src/main/java/org/springblade/modules/resource/builder/oss/OssBuilder.java

@@ -60,12 +60,12 @@ public class OssBuilder {
 	/**
 	 * OssTemplate配置缓存池
 	 */
-	private Map<String, OssTemplate> templatePool = new ConcurrentHashMap<>();
+	private final Map<String, OssTemplate> templatePool = new ConcurrentHashMap<>();
 
 	/**
 	 * oss配置缓存池
 	 */
-	private Map<String, Oss> ossPool = new ConcurrentHashMap<>();
+	private final Map<String, Oss> ossPool = new ConcurrentHashMap<>();
 
 	/**
 	 * 获取template

src/main/java/org/springblade/modules/resource/builder/sms/SmsBuilder.java

@@ -62,12 +62,12 @@ public class SmsBuilder {
 	/**
 	 * SmsTemplate配置缓存池
 	 */
-	private Map<String, SmsTemplate> templatePool = new ConcurrentHashMap<>();
+	private final Map<String, SmsTemplate> templatePool = new ConcurrentHashMap<>();
 
 	/**
 	 * Sms配置缓存池
 	 */
-	private Map<String, Sms> smsPool = new ConcurrentHashMap<>();
+	private final Map<String, Sms> smsPool = new ConcurrentHashMap<>();
 
 
 	/**