[SPARK-45951][INFRA] Upgrade buf to v1.28.1

### What changes were proposed in this pull request?
Upgrade `buf` to v1.28.1

### Why are the changes needed?
`buf` was upgraded to 1.26.1 two months ago, so I think it is time to upgrade it again.

this upgrade cause no change in generated codes, and it fixed multiple issues:

https://github.com/bufbuild/buf/releases

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
ci

### Was this patch authored or co-authored using generative AI tooling?
no

Closes apache#43835 from zhengruifeng/connect_buf_1_28_1.

Lead-authored-by: Ruifeng Zheng <ruifengz@apache.org>
Co-authored-by: Ruifeng Zheng <ruifengz@foxmail.com>
Signed-off-by: yangjie01 <yangjie01@baidu.com>

.github/workflows/build_and_test.yml

@@ -704,7 +704,7 @@ jobs:
       if: inputs.branch != 'branch-3.3' && inputs.branch != 'branch-3.4'
       run: |
         # See more in "Installation" https://docs.buf.build/installation#tarball
-        curl -LO https://github.com/bufbuild/buf/releases/download/v1.26.1/buf-Linux-x86_64.tar.gz
+        curl -LO https://github.com/bufbuild/buf/releases/download/v1.28.1/buf-Linux-x86_64.tar.gz
         mkdir -p $HOME/buf
         tar -xvzf buf-Linux-x86_64.tar.gz -C $HOME/buf --strip-components 1
         rm buf-Linux-x86_64.tar.gz

python/docs/source/development/contributing.rst

@@ -120,7 +120,7 @@ Prerequisite
 
 PySpark development requires to build Spark that needs a proper JDK installed, etc. See `Building Spark <https://spark.apache.org/docs/latest/building-spark.html>`_ for more details.
 
-Note that if you intend to contribute to Spark Connect in Python, ``buf`` version ``1.26.1`` is required, see `Buf Installation <https://docs.buf.build/installation>`_ for more details.
+Note that if you intend to contribute to Spark Connect in Python, ``buf`` version ``1.28.1`` is required, see `Buf Installation <https://docs.buf.build/installation>`_ for more details.
 
 Conda
 ~~~~~