docs: add GitPOAP section to README (#1157)

Co-authored-by: Rootul P <rootulp@gmail.com>

README.md

@@ -91,6 +91,10 @@ Releases are formatted: `v<CELESTIA_CORE_VERSION>-tm-v<TENDERMINT_CORE_VERSION>`
 For example: [`v1.4.0-tm-v0.34.20`](https://github.com/celestiaorg/celestia-core/releases/tag/v1.4.0-tm-v0.34.20) is celestia-core version `1.4.0` based on CometBFT `0.34.20`.
 `CELESTIA_CORE_VERSION` strives to adhere to [Semantic Versioning](http://semver.org/).
 
+## GitPOAP
+
+This repo is eligible for [GitPOAP](https://www.gitpoap.io). You can see the remaining eligible repositories at [gitpoap/celestiaorg](https://www.gitpoap.io/gh/celestiaorg).
+
 ## Careers
 
 We are hiring Go engineers! Join us in building the future of blockchain scaling and interoperability. [Apply here](https://jobs.lever.co/celestia).