build: Java版本升级到21 & SpringBoot版本升级到2.7.18

novel-crawl/pom.xml

@@ -21,6 +21,12 @@
             <artifactId>novel-common</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>2.2</version>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-security</artifactId>
@@ -29,7 +35,6 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>${jackson.version}</version>
         </dependency>