Update plugin forbiddenApis to v3.8 (#594)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -126,7 +126,7 @@ versions = { id = "com.github.ben-manes.versions", version = "0.51.0" }
 license = { id = "com.github.hierynomus.license", version = "0.16.1" }
 shadow = { id = "com.github.johnrengelman.shadow", version = "8.1.1" }
 spotbugs = { id = "com.github.spotbugs", version = "4.8.0" }
-forbiddenApis = { id = "de.thetaphi.forbiddenapis", version = "3.7" }
+forbiddenApis = { id = "de.thetaphi.forbiddenapis", version = "3.8" }