build(deps): bump org.springframework:spring-core

Bumps [org.springframework:spring-core](https://github.com/spring-projects/spring-framework) from 4.3.30.RELEASE to 7.0.7.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.3.30.RELEASE...v7.0.7)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-version: 7.0.7
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -145,7 +145,7 @@ def libraries = [
   servletApi          : 'jakarta.servlet:jakarta.servlet-api:4.0.4',
   slf4jBom            : 'org.slf4j:slf4j-bom:2.0.18',
   spark               : 'com.sparkjava:spark-core:2.9.4',
-  spring              : 'org.springframework:spring-core:4.3.30.RELEASE',
+  spring              : 'org.springframework:spring-core:7.0.7',
   springSecurity      : 'org.springframework.security:spring-security-config:4.2.20.RELEASE',
   springTestJunit5    : 'com.github.sbrannen:spring-test-junit5:1.5.0',
   systemStubs         : 'uk.org.webcompere:system-stubs-jupiter:2.1.8',