Update scala-library to 2.13.18

Author: http4s-steward[bot]

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
               - macos-11
               - macos-12
               - windows-2022
-        scala: [3.3.3, 2.13.12]
+        scala: [3.3.3, 2.13.18]
         java: [temurin@17]
         project: [rootJVM, rootNative]
         include:

project/Versions.scala

@@ -1,6 +1,6 @@
 object Versions {
   val scala3 = "3.3.3"
-  val scala213 = "2.13.12"
+  val scala213 = "2.13.18"
   val http4sVersion = "0.23.27"
   val catsEffectVersion = "3.5.4"
   val munitCEVersion = "2.0.0-RC1"