Updated documentation.

src/common/utils.nim

@@ -16,6 +16,7 @@ proc toBytes*(T: type string, data: string): seq[byte] =
 #[
     Compile-time string encryption using simple XOR
     This is done to hide sensitive strings, such as C2 profile settings in the binary 
+    Original: https://github.com/S3cur3Th1sSh1t/nim-strenc/blob/main/src/strenc.nim
 ]#
 proc calculate(str: string, key: int): string {.noinline.} = 
     var k = key