deps/api: Bump opentelemetry_proto -> 1.9.0

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

Author: dependency-envoy[bot]

api/bazel/repository_locations.bzl

@@ -131,9 +131,9 @@ REPOSITORY_LOCATIONS_SPEC = dict(
         project_name = "OpenTelemetry Proto",
         project_desc = "Language Independent Interface Types For OpenTelemetry",
         project_url = "https://github.com/open-telemetry/opentelemetry-proto",
-        version = "1.8.0",
-        sha256 = "057812cab50122c0fd504aae57b0b58424a5ec05d1b07889814bdfc7699abbe7",
-        release_date = "2025-09-02",
+        version = "1.9.0",
+        sha256 = "2d2220db196bdfd0aec872b75a5e614458f8396557fc718b28017e1a08db49e4",
+        release_date = "2025-10-31",
         strip_prefix = "opentelemetry-proto-{version}",
         urls = ["https://github.com/open-telemetry/opentelemetry-proto/archive/v{version}.tar.gz"],
         use_category = ["api"],