chore: skip style checks in sider

[skip ci]
diff --git a/.flake8 b/.flake8
index 4ff8840..4b852ab 100644
--- a/.flake8
+++ b/.flake8
@@ -31,6 +31,7 @@
     E124, # closing bracket, irritating while writing QB code
     E131, # continuation line unaligned for hanging indent
     E123, # closing bracket does not match indentation of opening bracket's line
+    E101, # ensured by use of black
 
 max-line-length = 200
 exclude=.github/helper/semgrep_rules