build(deps): bump github.com/linxGnu/grocksdb from 1.7.14 to 1.7.15 (#4251)

Bumps [github.com/linxGnu/grocksdb](https://github.com/linxGnu/grocksdb) from 1.7.14 to 1.7.15.
- [Release notes](https://github.com/linxGnu/grocksdb/releases)
- [Commits](https://github.com/linxGnu/grocksdb/compare/v1.7.14...v1.7.15)

---
updated-dependencies:
- dependency-name: github.com/linxGnu/grocksdb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -61,7 +61,7 @@ require (
 	github.com/klauspost/reedsolomon v1.11.7
 	github.com/kurin/blazer v0.5.3
 	github.com/lib/pq v1.10.7
-	github.com/linxGnu/grocksdb v1.7.14
+	github.com/linxGnu/grocksdb v1.7.15
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-ieproxy v0.0.9 // indirect