Update fn to v1.0.212 (#1160)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 micronaut = "4.10.0"
 micronaut-platform = "4.9.1"
 micronaut-docs = "2.0.0"
-fn = '1.0.209'
+fn = '1.0.212'
 graal-svm = "23.1.7"
 javapoet = '1.13.0'
 kotlin = '1.9.25'