Update dependency io.github.manamiproject:modb-kitsu to v6.1.6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ modb-anidb = "6.1.6"
 modb-anilist = "7.1.7"
 modb-animeplanet = "6.2.6"
 modb-anisearch = "4.1.7"
-modb-kitsu = "6.1.5"
+modb-kitsu = "6.1.6"
 modb-livechart = "4.1.6"
 modb-myanimelist = "7.1.5"
 modb-notify = "6.1.6"