dependency: Update dependency net.kyori:adventure-text-serializer-legacy to v4.26.1 (#644)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

buildSrc/src/main/kotlin/Versions.kt

@@ -49,7 +49,7 @@ object Versions {
 
     // Adventure
     const val ADVENTURE_MINIMESSAGES = "4.26.1"
-    const val ADVENTURE_TEXT_SERIALIZER_LEGACY = "4.25.0"
+    const val ADVENTURE_TEXT_SERIALIZER_LEGACY = "4.26.1"
     const val ADVENTURE_PLATFORM_API = "4.4.1"
 
     // Jakarta