update deps

pom.xml

@@ -12,7 +12,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <java.version>17</java.version>
+    <java.version>21</java.version>
 
     <maven.build.timestamp.format>yyyyMMdd-HHmm</maven.build.timestamp.format>
     <dependency.spring.version>5.3.32</dependency.spring.version>
@@ -27,13 +27,13 @@
     <jquery.form.version>4.3.0</jquery.form.version>
     <jetty.version>10.0.16</jetty.version>
     <akka.version>2.6.21</akka.version>
-    <log4j.version>2.22.0</log4j.version>
+    <log4j.version>2.23.1</log4j.version>
     <d3js.version>5.9.7</d3js.version>
     <momentjs.version>2.29.4</momentjs.version>
     <js-cookie.version>3.0.1</js-cookie.version>
     <circe.version>0.14.6</circe.version>
     <twemoji.version>14.0.2</twemoji.version>
-    <sttp.version>3.9.1</sttp.version>
+    <sttp.version>3.9.4</sttp.version>
     <flexmark.version>0.42.14</flexmark.version>
   </properties>