chore(deps): update dependency com.sap.cds:cds4j-api to v3.9.0 (#1741)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.sap.cds:cds4j-api](http://www.sap.com) | `3.8.1` -> `3.9.0` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/com.sap.cds:cds4j-api/3.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.sap.cds:cds4j-api/3.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.sap.cds:cds4j-api/3.8.1/3.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.sap.cds:cds4j-api/3.8.1/3.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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Diff for: .vitepress/config.js

@@ -107,7 +107,7 @@ config.rewrites = rewrites
 config.themeConfig.capire = {
   versions: {
     java_services: '3.8.1',
-    java_cds4j: '3.8.1'
+    java_cds4j: '3.9.0'
   },
   gotoLinks: [],
   maven_host_base: 'https://repo1.maven.org/maven2'