[chore]: Bump github.com/uptrace/bun from 1.2.6 to 1.2.8

Bumps [github.com/uptrace/bun](https://github.com/uptrace/bun) from 1.2.6 to 1.2.8.
- [Release notes](https://github.com/uptrace/bun/releases)
- [Changelog](https://github.com/uptrace/bun/blob/master/CHANGELOG.md)
- [Commits](https://github.com/uptrace/bun/compare/v1.2.6...v1.2.8)

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

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

vendor/github.com/uptrace/bun/query_index_drop.go

@@ -15,7 +15,8 @@ type DropIndexQuery struct {
 	concurrently bool
 	ifExists     bool
 
-	index schema.QueryWithArgs
+	index   schema.QueryWithArgs
+	comment string
 }
 
 var _ Query = (*DropIndexQuery)(nil)
@@ -74,6 +75,14 @@ func (q *DropIndexQuery) Index(query string, args ...interface{}) *DropIndexQuer
 
 //------------------------------------------------------------------------------
 
+// Comment adds a comment to the query, wrapped by /* ... */.
+func (q *DropIndexQuery) Comment(comment string) *DropIndexQuery {
+	q.comment = comment
+	return q
+}
+
+//------------------------------------------------------------------------------
+
 func (q *DropIndexQuery) Operation() string {
 	return "DROP INDEX"
 }
@@ -83,6 +92,8 @@ func (q *DropIndexQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte
 		return nil, q.err
 	}
 
+	b = appendComment(b, q.comment)
+
 	b = append(b, "DROP INDEX "...)
 
 	if q.concurrently {