Update dependency com.monovore:decline to v2.6.0 (#1714)

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

Author: renovate[bot]

build.sbt

@@ -409,7 +409,7 @@ lazy val cli = project
       |import codes.quine.labs.recheck.cli.*
       |""".stripMargin,
     // Dependencies:
-    libraryDependencies += "com.monovore" %% "decline" % "2.5.0",
+    libraryDependencies += "com.monovore" %% "decline" % "2.6.0",
     libraryDependencies += "io.circe" %% "circe-core" % "0.14.15",
     libraryDependencies += "io.circe" %% "circe-generic" % "0.14.15",
     libraryDependencies += "io.circe" %% "circe-parser" % "0.14.15",