Bump flake8 from 7.2.0 to 7.3.0 (#51)

dependabot[bot] · web-flow · commit 856a4ffe1b87 · 2025-07-07T14:00:40.000Z
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,4 @@
 slack-bolt==1.23.0
 pytest==8.4.1
-flake8==7.2.0
+flake8==7.3.0
 black==25.1.0
