Upgrades TF dependency to 2.8

PiperOrigin-RevId: 427367451

Author: tfx-copybara

RELEASE.md

@@ -6,6 +6,8 @@
 
 ## Bug Fixes and Other Changes
 
+*   Depends on `tensorflow>=2.8.0,<2.9`.
+
 ## Breaking Changes
 
 ## Deprecations

WORKSPACE

@@ -39,8 +39,8 @@ tf_configure(name = "local_config_tf")
 # 3. Request the new archive to be mirrored on mirror.bazel.build for more
 #    reliable downloads.
 
-_TENSORFLOW_GIT_COMMIT = "919f693420e35d00c8d0a42100837ae3718f7927"  # tf 2.6.0
-_TENSORFLOW_ARCHIVE_SHA256 = "70a865814b9d773024126a6ce6fea68fefe907b7ae6f9ac7e656613de93abf87"
+_TENSORFLOW_GIT_COMMIT = "3f878cff5b698b82eea85db2b60d65a2e320850e"  # tf 2.8.0
+_TENSORFLOW_ARCHIVE_SHA256 = "21d919ad6d96fcc0477c8d4f7b1f7e4295aaec2986e035551ed263c2b1cd52ee"
 
 http_archive(
     name = "org_tensorflow",

setup.py

@@ -75,7 +75,7 @@ def select_constraint(default, nightly=None, git_master=None):
     packages=find_packages(),
     install_requires=[
         'protobuf>=3.13,<4',
-        'tensorflow>=2.7.0,<2.8',
+        'tensorflow>=2.8.0,<2.9',
         'tensorflow-metadata' + select_constraint(
             default='>=1.6.0,<1.7.0',
             nightly='>=1.7.0.dev',