Bump org.springframework.boot from 3.3.5 to 3.4.1 in /service (#1035)

* Bump org.springframework.boot from 3.3.5 to 3.4.1 in /service

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.3.5 to 3.4.1.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.5...v3.4.1)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

* Upgrade to Mongo 4 in integration tests

Following on from 97fc371

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Adrian Clay <[email protected]>

Author: dependabot[bot]

service/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '3.3.5'
+	id 'org.springframework.boot' version '3.4.1'
 	id 'io.spring.dependency-management' version '1.1.7'
 	id 'java'
 	id "checkstyle"

service/src/intTest/java/uk/nhs/adaptors/gp2gp/testcontainers/MongoDbContainer.java

@@ -7,7 +7,7 @@
 @Slf4j
 public final class MongoDbContainer extends GenericContainer<MongoDbContainer> {
     public static final int MONGODB_PORT = 27017;
-    public static final String DEFAULT_IMAGE_AND_TAG = "mongo:3.6.23";
+    public static final String DEFAULT_IMAGE_AND_TAG = "mongo:4.0.28";
     private static MongoDbContainer container;
 
     private MongoDbContainer() {