Fix credits role translation keys not being lowercased

src/main/java/com/terraformersmc/modmenu/gui/widget/DescriptionListWidget.java

@@ -395,7 +395,7 @@ public void confirmResult(boolean result, int id) {
 	private Text creditsRoleText(String roleName) {
 		// Replace spaces and dashes in role names with underscores if they exist
 		// Notably Quilted Fabric API does this with FabricMC as "Upstream Owner"
-		String translationKey = roleName.replaceAll("[\\s-]", "_");
+		String translationKey = roleName.replaceAll("[\\s-]", "_").toLowerCase();
 
 		return new TranslatableText("modmenu.credits.role." + translationKey).append(new LiteralText(":"));
 	}