[FLINK-38594][pyflink] test latest flake8 with CI - do not merge

Signed-off-by: davidradl <[email protected]>

Author: davidradl

flink-python/pyproject.toml

@@ -55,7 +55,7 @@ tox = [
     "tox==3.14.0"
 ]
 flake8 = [
-    "flake8==7.2.0"
+    "flake8==7.3.0"
 ]
 sphinx = [
     "Sphinx==4.5.0",