start-jupyter: WSL2 has lower case microsoft in uname -a

start-jupyter

@@ -323,7 +323,7 @@ function launch_browser() {
             ;;
         Linux)
             case "$(uname -a)" in
-                *Microsoft*|*WSL*)
+                *[Mm]icrosoft*|*WSL*)
                     cmd.exe /c start "${url}" || show_url "${url}"
                     ;;
                 *)