chore(gradle): bump software.amazon.awssdk:bom from 2.29.52 to 2.46.21

Bumps software.amazon.awssdk:bom from 2.29.52 to 2.46.21.

---
updated-dependencies:
- dependency-name: software.amazon.awssdk:bom
  dependency-version: 2.46.21
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ airlift = "2.0.3"
 arrow = "18.3.0"
 autoservice = "1.1.1"
 avro = "1.12.1"
-awssdk = "2.29.52"
+awssdk = "2.46.21"
 aws-s3-tables-catalog-for-iceberg = "0.1.8"
 
 # Note: when bumping Calcite version, see if we still need the version constraint for json-smart