Add Vee to credits

He did say to feel free to not credit him, but I'd like to add him
anyways just for completeness's sake.

desktop_version/CONTRIBUTORS.txt

@@ -33,3 +33,4 @@ Contributors
 * Tynan Richards (@tzann)
 * Wouter (@Xesxen)
 * viri (viri.moe)
+* Vittorio Romeo (@SuperV1234)

desktop_version/src/Credits.h

@@ -116,6 +116,7 @@ static const char* githubfriends[] = {
     "Tynan Richards",
     "Wouter",
     "viri",
+    "Vittorio Romeo",
 };
 
 /* Calculate credits length, finally. */