Bump spring.version from 6.1.4 to 6.1.5 (#743)

Bumps `spring.version` from 6.1.4 to 6.1.5.

Updates `org.springframework:spring-test` from 6.1.4 to 6.1.5
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v6.1.4...v6.1.5)

Updates `org.springframework:spring-webmvc` from 6.1.4 to 6.1.5
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v6.1.4...v6.1.5)

Updates `org.springframework:spring-web` from 6.1.4 to 6.1.5
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v6.1.4...v6.1.5)

Updates `org.springframework:spring-webflux` from 6.1.4 to 6.1.5
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v6.1.4...v6.1.5)

---
updated-dependencies:
- dependency-name: org.springframework:spring-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-webmvc
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-web
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-webflux
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

json-unit-spring/pom.xml

@@ -6,7 +6,7 @@
         Spring Mock assertions
     </description>
     <properties>
-        <spring.version>6.1.4</spring.version>
+        <spring.version>6.1.5</spring.version>
         <kotlin.compiler.jvmTarget>17</kotlin.compiler.jvmTarget>
         <osgi.exportPackage>net.javacrumbs.jsonunit.spring</osgi.exportPackage>
     </properties>