refactor: apply description suggestions from code review

Co-authored-by: Susa Tünker <74345218+sujaya-sys@users.noreply.github.com>

Author: pmallol

constructs/multistep-check.mdx

@@ -42,7 +42,7 @@ import * as path from "path"
 
 new MultiStepCheck("complex-multistep-check", {
   name: "Complex User Journey",
-  description: "Runs a **multi-step** API workflow end-to-end.",
+  description: "Validates user signup and login flow.",
   activated: true,
   runtimeId: "2025.04",
   frequency: Frequency.EVERY_15M,

constructs/tcp-monitor.mdx

@@ -48,7 +48,7 @@ import { Frequency, TcpAssertionBuilder, TcpMonitor } from "checkly/constructs"
 
 new TcpMonitor("redis-tcp-1", {
   name: "Redis Service Check",
-  description: "Verifies **PostgreSQL** on `db.example.com:5432` accepts connections.",
+  description: "Verifies **Redis service** is reachable and responsive.",
   activated: true,
   frequency: Frequency.EVERY_5M,
   locations: ["us-east-1", "eu-west-1"],

constructs/url-monitor.mdx

@@ -47,7 +47,7 @@ import { Frequency, UrlAssertionBuilder, UrlMonitor } from "checkly/constructs"
 
 new UrlMonitor("advanced-url-monitor", {
   name: "Advanced URL Monitor",
-  description: "[httpbin.org/get](https://httpbin.org/get) should return **200** status code.",
+  description: "**API health check** returns 200.",
   activated: true,
   frequency: Frequency.EVERY_5M,
   locations: ["us-east-1", "eu-west-1"],