Fixed Exception when ScamBlocker checks messages outside of TextChannel

[Zabuzard]

Fixes the following exception that keeps happening currently:

One of the EventListeners had an uncaught exception
java.lang.IllegalStateException: Cannot convert channel of type ThreadChannel to TextChannel!
at net.dv8tion.jda.internal.utils.ChannelUtil.safeChannelCast(ChannelUtil.java:51)
at net.dv8tion.jda.internal.entities.channel.AbstractChannelImpl.asTextChannel(AbstractChannelImpl.java:82)
at org.togetherjava.tjbot.features.moderation.scam.ScamBlocker.onMessageReceived(ScamBlocker.java:133)
at org.togetherjava.tjbot.features.system.BotCore.lambda$onMessageReceived$9(BotCore.java:221)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
at java.base/java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1858)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at java.base/jav...

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud