Fix pulling licenses (#25235)

diff --git a/sdks/python/container/license_scripts/dep_urls_py.yaml b/sdks/python/container/license_scripts/dep_urls_py.yaml
index ed6bf89..9aa1111 100644
--- a/sdks/python/container/license_scripts/dep_urls_py.yaml
+++ b/sdks/python/container/license_scripts/dep_urls_py.yaml
@@ -65,7 +65,7 @@
     license: "https://raw.githubusercontent.com/fastavro/fastavro/master/LICENSE"
     notice: "https://raw.githubusercontent.com/fastavro/fastavro/master/NOTICE.txt"
   flatbuffers:
-    license: "https://raw.githubusercontent.com/google/flatbuffers/master/LICENSE.txt"
+    license: "https://raw.githubusercontent.com/google/flatbuffers/master/LICENSE"
   funcsigs:
     license: "https://raw.githubusercontent.com/aliles/funcsigs/master/LICENSE"
   futures: