Bump com.diffplug.spotless in /components/serialization/multipart

Bumps com.diffplug.spotless from 6.23.0 to 6.23.1.

---
updated-dependencies:
- dependency-name: com.diffplug.spotless
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

components/serialization/multipart/build.gradle

@@ -6,7 +6,7 @@ plugins {
     id 'signing'
     id 'jacoco'
     id 'com.github.spotbugs' version '5.2.4'
-    id "com.diffplug.spotless" version "6.23.0"
+    id "com.diffplug.spotless" version "6.23.1"
 }
 
 java {