deps: Bump kafka_source -> 3.9.1

Signed-off-by: dependency-envoy[bot] <148525496+dependency-envoy[bot]@users.noreply.github.com>

Author: dependency-envoy[bot]

bazel/repository_locations.bzl

@@ -1439,13 +1439,13 @@ REPOSITORY_LOCATIONS_SPEC = dict(
         project_name = "Kafka (source)",
         project_desc = "Open-source distributed event streaming platform",
         project_url = "https://kafka.apache.org",
-        version = "3.8.0",
-        sha256 = "8761a0c22738201d3049f11f78c8e6c0f201203ba799157e498ef7eb04c259f3",
+        version = "3.9.1",
+        sha256 = "c15b82940cfb9f67fce909d8600dc8bcfc42d2795da2c26c149d03a627f85234",
         strip_prefix = "kafka-{version}/clients/src/main/resources/common/message",
         urls = ["https://github.com/apache/kafka/archive/{version}.zip"],
         use_category = ["dataplane_ext"],
         extensions = ["envoy.filters.network.kafka_broker", "envoy.filters.network.kafka_mesh"],
-        release_date = "2024-07-23",
+        release_date = "2025-05-12",
         cpe = "cpe:2.3:a:apache:kafka:*",
         license = "Apache-2.0",
         license_url = "https://github.com/apache/kafka/blob/{version}/LICENSE",