Merge pull request #4100 from choongwho/patch-1

Added HS Ping to the APIs, Data, and ML section

README.md

@@ -274,6 +274,7 @@ This list results from Pull Requests, reviews, ideas, and work done by 1600+ peo
   * [Hex](https://hex.tech/) - a collaborative data platform for notebooks, data apps, and knowledge libraries. Free community tier with up to five projects.
   * [Hook0](https://www.hook0.com/) - Hook0 is an open-source Webhooks-as-a-service (WaaS) that makes it easy for online products to provide webhooks. Dispatch up to 100 events/day with seven days of history retention for free.
   * [Hoppscotch](https://hoppscotch.io) - A free, fast, and beautiful API request builder.
+  * [HS Ping](https://hsping.com) - A multi-country HS (Harmonized System) and HTS (Harmonized Tariff System) code lookup API, with a free plan offering 100 lookups/day.
   * [huggingface.co](https://huggingface.co) - Build, train, and deploy NLP models for Pytorch, TensorFlow, and JAX. Free up to 30k input characters/mo.
   * [Insomnia](https://insomnia.rest) - Open-source API client for designing and testing APIs, it supports REST and GraphQL
   * [Invantive Cloud](https://cloud.invantive.com/) — Access over 70 (cloud)platforms such as Exact Online, Twinfield, ActiveCampaign or Visma using Invantive SQL or OData4 (typically Power BI or Power Query). Includes data replication and exchange. Free plan for developers and implementation consultants. Free for specific platforms with limitations in data volumes.