.github/linters: Ignore E704 warning

since black and flake8 disagree on code style:
pyvista/pyvista#5591

Signed-off-by: Xiang Xiao <[email protected]>

Author: xiaoxiang781216

.github/linters/setup.cfg

@@ -1,5 +1,5 @@
 [flake8]
-ignore = W503,W605,E203
+ignore = W503,W605,E203,E704
 max-complexity = 27
 max-line-length = 125
 multi_line_output=3