Bump io.freefair.aggregate-javadoc from 8.13 to 8.13.1 (#9936)

Bumps io.freefair.aggregate-javadoc from 8.13 to 8.13.1.

---
updated-dependencies:
- dependency-name: io.freefair.aggregate-javadoc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -24,7 +24,7 @@ plugins {
     id 'io.spring.antora.generate-antora-yml' version '0.0.1'
     id 'com.github.spotbugs' version '6.1.7'
     id 'com.google.protobuf' version '0.9.4' apply false
-    id 'io.freefair.aggregate-javadoc' version '8.13'
+    id 'io.freefair.aggregate-javadoc' version '8.13.1'
 }
 
 if (isCI) {