Bump org.springframework.security:spring-security-bom

Bumps [org.springframework.security:spring-security-bom](https://github.com/spring-projects/spring-security) from 5.8.8 to 6.4.3.
- [Release notes](https://github.com/spring-projects/spring-security/releases)
- [Changelog](https://github.com/spring-projects/spring-security/blob/main/RELEASE.adoc)
- [Commits](spring-projects/spring-security@5.8.8...6.4.3)

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

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

Author: dependabot[bot]

pom.xml

@@ -38,8 +38,8 @@
         <solon.version>3.0.1</solon.version>
         <springframework5.version>5.3.31</springframework5.version>
         <springframework6.version>6.1.3</springframework6.version>
-        <springsecurity5.version>5.8.8</springsecurity5.version>
-        <springsecurity6.version>6.2.1</springsecurity6.version>
+        <springsecurity5.version>6.4.3</springsecurity5.version>
+        <springsecurity6.version>6.4.3</springsecurity6.version>
         <springboot2.version>2.7.18</springboot2.version>
         <springboot3.version>3.2.2</springboot3.version>
         <springdata2021.version>2021.2.18</springdata2021.version>