[gitignore] Add *~ to gitignore (project-chip#12658)

erjiaqing · web-flow · commit 4655ab759516 · 2021-12-07T09:33:57.000-05:00
diff --git a/.gitignore b/.gitignore
@@ -57,3 +57,6 @@ docs/html
 
 # compilation database for VSCode and other Ides
 compile_commands.json
+
+# backup files, usually created by the ZAP tool
+*~
