fix: Fixed greet/bye messages showing wrong message in the wrong server sometimes

docs: Version upped to 5.1.12. Updated CHANGELOG.md

src/NadekoBot/Modules/Utility/Repeater/RepeaterService.cs

@@ -12,7 +12,7 @@ public sealed class RepeaterService : IReadyExecutor, INService
 
     private readonly DbService _db;
     private readonly IReplacementService _repSvc;
-    private readonly IBotCredentials _creds;
+    private readonly IBotCreds _creds;
     private readonly DiscordSocketClient _client;
     private readonly LinkedList<RunningRepeater> _repeaterQueue;
     private readonly ConcurrentHashSet<int> _noRedundant;
@@ -25,7 +25,7 @@ public sealed class RepeaterService : IReadyExecutor, INService
         DiscordSocketClient client,
         DbService db,
         IReplacementService repSvc,
-        IBotCredentials creds,
+        IBotCreds creds,
         IMessageSenderService sender)
     {
         _db = db;