chore(deps): update dependencies to v3

Author: renovate[bot]

ch-covidcertificate-backend-verification-check/pom.xml

@@ -23,7 +23,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-        <spring-boot-version>2.7.8</spring-boot-version>
+        <spring-boot-version>3.0.4</spring-boot-version>
         <spring-cloud-sleuth-version>3.1.6</spring-cloud-sleuth-version>
         <jackson-version>2.11.1</jackson-version>
         <spring-cloud-connectors-version>2.2.13.RELEASE</spring-cloud-connectors-version>