fix: samples/client/petstore/java/webclient-jakarta/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230372
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230364
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230365
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230366
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230367

Author: snyk-bot

samples/client/petstore/java/webclient-jakarta/pom.xml

@@ -123,7 +123,7 @@
         <jackson-version>2.17.1</jackson-version>
         <jackson-databind-version>2.17.1</jackson-databind-version>
         <jackson-databind-nullable-version>0.2.6</jackson-databind-nullable-version>
-        <spring-boot-version>3.0.12</spring-boot-version>
+        <spring-boot-version>3.2.11</spring-boot-version>
         <jakarta-annotation-version>2.1.1</jakarta-annotation-version>
         <reactor-version>3.5.12</reactor-version>
         <reactor-netty-version>1.1.13</reactor-netty-version>