Make Baikal More Common (#1616)

## Description:
This PR updates the chance of the Baikal Map from 1 to 2. (Following the
rise in popularity of the map)

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [ ] I have read and accepted the CLA agreement (only required once).

## Please put your Discord username so you can be contacted if a bug or
regression is found:

DISCORD_USERNAME
Nikola123

src/server/MapPlaylist.ts

@@ -24,6 +24,7 @@ const frequency: Partial<Record<GameMapName, number>> = {
   World: 3,
   Europe: 2,
   Africa: 2,
+  Baikal: 2,
   Australia: 1,
   NorthAmerica: 1,
   Britannia: 1,
@@ -41,7 +42,6 @@ const frequency: Partial<Record<GameMapName, number>> = {
   BlackSea: 1,
   FaroeIslands: 1,
   FalklandIslands: 1,
-  Baikal: 1,
   Halkidiki: 1,
   StraitOfGibraltar: 1,
   Italia: 1,