Bump reactor-core from 3.5.6 to 3.5.7

Bumps [reactor-core](https://github.com/reactor/reactor-core) from 3.5.6 to 3.5.7.
- [Release notes](https://github.com/reactor/reactor-core/releases)
- [Commits](reactor/reactor-core@v3.5.6...v3.5.7)

---
updated-dependencies:
- dependency-name: io.projectreactor:reactor-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -57,7 +57,7 @@
         <extension.springcloud.version>4.7.0</extension.springcloud.version>
         <extension.tracing.version>4.7.0</extension.tracing.version>
 
-        <projectreactor.version>3.5.6</projectreactor.version>
+        <projectreactor.version>3.5.7</projectreactor.version>
     </properties>
 
     <dependencyManagement>