Update springDocVersion to v3

Author: renovate[bot]

build.gradle

@@ -33,7 +33,7 @@ plugins {
 ext {
     // versions of dependencies
     springBootVersion = '3.5.8'
-    springDocVersion  = '2.8.14'
+    springDocVersion  = '3.0.0'
     javersVersion     = '7.9.0'
 }