chore: Update generation configuration at Fri Jan 16 02:37:13 UTC 2026

Author: cloud-java-bot

generation_config.yaml

@@ -1,6 +1,6 @@
 gapic_generator_version: 2.65.1
-googleapis_commitish: 415914bd49d41beaae8a9adb348ee2587c93aa70
-libraries_bom_version: 26.74.0-rc2
+googleapis_commitish: 4b44360f9c5d23df8c09220d9ee8d2656ca44727
+libraries_bom_version: 26.73.0
 libraries:
   - api_shortname: firestore
     name_pretty: Cloud Firestore