Update dbt-core requirement from ~=1.8.6 to ~=1.8.7

Updates the requirements on [dbt-core](https://github.com/dbt-labs/dbt-core) to permit the latest version.
- [Release notes](https://github.com/dbt-labs/dbt-core/releases)
- [Changelog](https://github.com/dbt-labs/dbt-core/blob/v1.8.7/CHANGELOG.md)
- [Commits](dbt-labs/dbt-core@v1.8.6...v1.8.7)

---
updated-dependencies:
- dependency-name: dbt-core
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

dev-requirements.txt

@@ -29,7 +29,7 @@ moto~=5.0.9
 pyparsing
 pyarrow
 
-dbt-core~=1.8.6
+dbt-core~=1.8.7
 dbt-spark~=1.8.0
 dbt-common>=1.0.4,<2.0
 dbt-adapters>=1.1.1,<2.0