Pokemon Emerald: Fix invalid escape sequence warnings (#4328)

Generation on Python 3.12 would print SyntaxWarnings due to invalid '\d'
escape sequences added in #3832.

Use raw strings to avoid `\` being used to escape characters.

worlds/pokemon_emerald/data.py

@@ -397,13 +397,13 @@ def _init() -> None:
         label = []
         for word in map_name[4:].split("_"):
             # 1F, B1F, 2R, etc.
-            re_match = re.match("^B?\d+[FRP]$", word)
+            re_match = re.match(r"^B?\d+[FRP]$", word)
             if re_match:
                 label.append(word)
                 continue
 
             # Route 103, Hall 1, House 5, etc.
-            re_match = re.match("^([A-Z]+)(\d+)$", word)
+            re_match = re.match(r"^([A-Z]+)(\d+)$", word)
             if re_match:
                 label.append(re_match.group(1).capitalize())
                 label.append(re_match.group(2).lstrip("0"))