Updated SC2164 (markdown)

SC2164.md

@@ -5,6 +5,11 @@
 ```sh
 cd generated_files
 rm -r *.c
+
+func(){
+  cd foo
+  do_something
+}
 ```
 
 ### Correct code:
@@ -12,6 +17,12 @@ rm -r *.c
 ```sh
 cd generated_files || exit
 rm -r *.c
+
+# For functions, you may want to use return:
+func(){
+  cd foo || return
+  do_something
+}
 ```
 
 ### Rationale: