[3.15] Add .toml to .editorconfig (GH-151481) (#151491)

Add `.toml` to `.editorconfig` (GH-151481)
(cherry picked from commit 7a70afa)

Co-authored-by: sobolevn <mail@sobolevn.me>

Author: miss-islington

.editorconfig

@@ -1,11 +1,11 @@
 root = true
 
-[*.{py,c,cpp,h,js,rst,md,yml,yaml,gram}]
+[*.{py,c,cpp,h,js,rst,md,yml,yaml,toml,gram}]
 trim_trailing_whitespace = true
 insert_final_newline = true
 indent_style = space
 
-[*.{py,c,cpp,h,gram}]
+[*.{py,c,cpp,h,toml,gram}]
 indent_size = 4
 
 [*.rst]