build(deps): bump github.com/IBM/go-sdk-core/v5 from 5.14.1 to 5.15.0

Bumps [github.com/IBM/go-sdk-core/v5](https://github.com/IBM/go-sdk-core) from 5.14.1 to 5.15.0.
- [Release notes](https://github.com/IBM/go-sdk-core/releases)
- [Changelog](https://github.com/IBM/go-sdk-core/blob/main/CHANGELOG.md)
- [Commits](IBM/go-sdk-core@v5.14.1...v5.15.0)

---
updated-dependencies:
- dependency-name: github.com/IBM/go-sdk-core/v5
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -3,7 +3,7 @@ module github.com/IBM/cloudant-go-sdk
 go 1.20
 
 require (
-	github.com/IBM/go-sdk-core/v5 v5.14.1
+	github.com/IBM/go-sdk-core/v5 v5.15.0
 	github.com/go-openapi/strfmt v0.21.7
 	github.com/onsi/ginkgo v1.16.5
 	github.com/onsi/gomega v1.30.0

go.sum

@@ -1,5 +1,5 @@
-github.com/IBM/go-sdk-core/v5 v5.14.1 h1:WR1r0zz+gDW++xzZjF41r9ueY4JyjS2vgZjiYs8lO3c=
-github.com/IBM/go-sdk-core/v5 v5.14.1/go.mod h1:MUvIr/1mgGh198ZXL+ByKz9Qs1JoEh80v/96x8jPXNY=
+github.com/IBM/go-sdk-core/v5 v5.15.0 h1:AhFoWVk3i58f9vnDoEoZumI/zbtRoP5moWIz5YQOmZg=
+github.com/IBM/go-sdk-core/v5 v5.15.0/go.mod h1:5Obavm/s1Tc2PxivEIfgCvj/HJ5h3QIOjLHS5y8QJf0=
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=