Bump base from 2023.6-SNAPSHOT to 2023.6

Bumps `base` from 2023.6-SNAPSHOT to 2023.6.

Updates `io.openapiprocessor:openapi-processor-test` from 2023.6-SNAPSHOT to 2023.6
- [Release notes](https://github.com/openapi-processor/openapi-processor-base/releases)
- [Commits](https://github.com/openapi-processor/openapi-processor-base/commits/v2023.6)

Updates `io.openapiprocessor:openapi-processor-core` from 2023.6-SNAPSHOT to 2023.6
- [Release notes](https://github.com/openapi-processor/openapi-processor-base/releases)
- [Commits](https://github.com/openapi-processor/openapi-processor-base/commits/v2023.6)

Updates `io.openapiprocessor:openapi-processor-core-parser-api` from 2023.6-SNAPSHOT to 2023.6
- [Release notes](https://github.com/openapi-processor/openapi-processor-base/releases)
- [Commits](https://github.com/openapi-processor/openapi-processor-base/commits/v2023.6)

Updates `io.openapiprocessor:openapi-processor-core-parser-swagger` from 2023.6-SNAPSHOT to 2023.6
- [Release notes](https://github.com/openapi-processor/openapi-processor-base/releases)
- [Commits](https://github.com/openapi-processor/openapi-processor-base/commits/v2023.6)

Updates `io.openapiprocessor:openapi-processor-core-parser-openapi4j` from 2023.6-SNAPSHOT to 2023.6
- [Release notes](https://github.com/openapi-processor/openapi-processor-base/releases)
- [Commits](https://github.com/openapi-processor/openapi-processor-base/commits/v2023.6)

---
updated-dependencies:
- dependency-name: io.openapiprocessor:openapi-processor-test
  dependency-type: direct:production
- dependency-name: io.openapiprocessor:openapi-processor-core
  dependency-type: direct:production
- dependency-name: io.openapiprocessor:openapi-processor-core-parser-api
  dependency-type: direct:production
- dependency-name: io.openapiprocessor:openapi-processor-core-parser-swagger
  dependency-type: direct:production
- dependency-name: io.openapiprocessor:openapi-processor-core-parser-openapi4j
  dependency-type: direct:production
...

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

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ build-jdk = "11"
 test-jdk = "17"
 
 api = "2023.1"
-base = "2023.6-SNAPSHOT"
+base = "2023.6"
 
 junit = "5.9.3"
 jacoco = "0.8.7"