If you only need to make a small change to the name, such as the version number:
Open the mission.sqm with a text editor, the name you've given the mission can be found in the Intel section under the definition briefingName:
version=11;
class Mission
{
addOns[]=
{
"bis_resistance",
"WEK_CobraAttacksInf"
};
addOnsAuto[]=
{
"bis_resistance",
"WEK_CobraAttacksInf"
};
randomSeed=16089603;
class Intel
{
briefingName="Cobra attacks Infantry";
};
class Groups
{
You can also have a briefingDescription line, but this is only visible in the multiplayer lobby.