Update TFF to depend on TF version `2.5.0`.

PiperOrigin-RevId: 374194494

Update TFF to depend on TF version `2.5.0`.
PiperOrigin-RevId: 374194494
c11235d9 · Michael Reneer · tensorflow-copybara · 6386a3f0 · c11235d9
--- a/tensorflow_federated/tools/development/setup.py
+++ b/tensorflow_federated/tools/development/setup.py
@@ -69,7 +69,7 @@ REQUIRED_PACKAGES = [
    'semantic-version~=2.8.5',
    'tensorflow-model-optimization~=0.5.0',
    'tensorflow-privacy~=0.5.0',
-    'tensorflow~=2.4.0',
+    'tensorflow~=2.5.0',
    'tqdm~=4.28.1',
 ]