Update 1.16.1 version.py and RELEASE.md (#80)

* Mark tfx_bsl compatible with Protobuf v26+.

PiperOrigin-RevId: 684974824

* Update 1.16.1 in version.py

---------

Co-authored-by: tfx-bsl-team <tensorflow-extended-nonhuman@googlegroups.com>

RELEASE.md

@@ -1,3 +1,21 @@
+# Version 1.16.1
+
+## Major Features and Improvements
+
+*   N/A
+
+## Bug Fixes and Other Changes
+
+*   Relax dependency on Protobuf to include version 5.x
+
+## Breaking Changes
+
+*   N/A
+
+## Deprecations
+
+*   N/A
+
 # Version 1.16.0
 
 ## Major Features and Improvements

setup.py

@@ -172,7 +172,7 @@ def select_constraint(default, nightly=None, git_master=None):
         'google-api-python-client>=1.7.11,<2',
         'numpy>=1.22.0',
         'pandas>=1.0,<2',
-        'protobuf>=4.25.2,<5;python_version>="3.11"',
+        'protobuf>=4.25.2,<6;python_version>="3.11"',
         'protobuf>=3.20.3,<5;python_version<"3.11"',
         'pyarrow>=10,<11',
         'tensorflow' + select_constraint(

tfx_bsl/version.py

@@ -14,4 +14,4 @@
 """Contains the version string of tfx_bsl."""
 
 # Note that setup.py uses this version.
-__version__ = '1.16.0'
+__version__ = '1.16.1'