Update Jetty dependency to 9.4.38

Fixes #433.

See: https://snyk.io/vuln/SNYK-JAVA-ORGECLIPSEJETTY-1080611

Author: weavejester

ring-jetty-adapter/project.clj

@@ -7,7 +7,7 @@
   :dependencies [[org.clojure/clojure "1.7.0"]
                  [ring/ring-core "1.9.1"]
                  [ring/ring-servlet "1.9.1"]
-                 [org.eclipse.jetty/jetty-server "9.4.36.v20210114"]]
+                 [org.eclipse.jetty/jetty-server "9.4.38.v20210224"]]
   :aliases {"test-all" ["with-profile" "default:+1.8:+1.9:+1.10" "test"]}
   :profiles
   {:dev  {:dependencies [[clj-http "3.10.0"]