docs: add build attestation verification step (#996)

Signed-off-by: Praveen K B <[email protected]>

Author: praveen5959

README.md

@@ -121,6 +121,14 @@ Traditionally, logging has been seen as a text search problem. Log volumes were
 
 But with log data growing exponentially, today's log data challenges involve whole lot more – Data ingestion, storage, and observation, all at scale. We are building Parseable to address these challenges.
 
+## Verify Image Build Provenance Attestation
+All the image builds/pushes are attested for build provenance and integrity using the [attest-build-provenance](https://github.com/actions/attest-build-provenance) action. The attestations can be verified by having the latest version of [GitHub CLI](https://github.com/cli/cli/releases/latest) installed in your system. Then, execute the following command:
+
+```sh
+gh attestation verify PATH/TO/YOUR/PARSEABLE/ARTIFACT-BINARY -R parseablehq/parseable
+```
+
+
 ## Contributing :trophy:
 
 <a href="https://github.com/parseablehq/parseable/graphs/contributors"><img src="https://contrib.rocks/image?repo=parseablehq/parseable" /></a>