fix: Remap bindings to not conflict with terminal (#247)

C-m is same as CR on a lot of terminals, remap to C-s

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

Author: deathbeam

lua/CopilotChat/config.lua

@@ -169,7 +169,7 @@ return {
     },
     submit_prompt = {
       normal = '<CR>',
-      insert = '<C-m>',
+      insert = '<C-s>',
     },
     accept_diff = {
       normal = '<C-y>',