Bump dbt-core from 1.8.3 to 1.8.7

Bumps [dbt-core](https://github.com/dbt-labs/dbt-core) from 1.8.3 to 1.8.7.
- [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@v1.8.3...v1.8.7)

---
updated-dependencies:
- dependency-name: dbt-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -1,4 +1,4 @@
 dbt-oracle==1.8.3
-dbt-core==1.8.3
+dbt-core==1.8.7
 sqlfluff==3.0.7
 sqlfluff-templater-dbt==3.0.7