doc: replace playground terme (#3588)

README.md

@@ -6,11 +6,12 @@ mass adoption.
 
 [![CI](https://github.com/massalabs/massa/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/massalabs/massa/actions/workflows/ci.yml?query=branch%3Amain)
 [![Bors enabled](https://bors.tech/images/badge_small.svg)](https://app.bors.tech/repositories/39543)
-[![Coverage Status](https://coveralls.io/repos/github/massalabs/massa/badge.svg?branch=main)](https://coveralls.io/github/massalabs/massa?branch=main)
-[![Docs](https://img.shields.io/static/v1?label=docs&message=massa&color=blue)](https://massalabs.github.io/massa/massa_node/)
-[![OpenRPC Playground](https://img.shields.io/static/v1?label=explore-openrpc-specification&message=massa&color=blue)](https://playground.open-rpc.org/?schemaUrl=https://test.massa.net/api/v2&uiSchema\[appBar\]\[ui:input\]=false&uiSchema\[appBar\]\[ui:inputPlaceholder\]=Enter+Massa+JSON-RPC+server+URL&uiSchema\[appBar\]\[ui:logoUrl\]=https://massa.net/favicons/favicon.ico&uiSchema\[appBar\]\[ui:splitView\]=false&uiSchema\[appBar\]\[ui:darkMode\]=false&uiSchema\[appBar\]\[ui:title\]=Massa&uiSchema\[appBar\]\[ui:examplesDropdown\]=false&uiSchema\[methods\]\[ui:defaultExpanded\]=false&uiSchema\[methods\]\[ui:methodPlugins\]=true&uiSchema\[params\]\[ui:defaultExpanded\]=false)
+[![Coverage Status](https://coveralls.io/repos/github/massalabs/massa/badge.svg?branch=main&style=for-the-badge)](https://coveralls.io/github/massalabs/massa?branch=main)
+[![Docs](https://img.shields.io/static/v1?label=docs&message=massa&color=&style=flat)](https://massalabs.github.io/massa/massa_node/)
 [![Open in Gitpod](https://shields.io/badge/Gitpod-contribute-brightgreen?logo=gitpod&style=flat)](https://gitpod.io/#https://github.com/massalabs/massa)
 
+[![OpenRPC Playground](https://img.shields.io/static/v1?label=interactive-api-specification&message=massa&style=for-the-badge&color=blue)](https://playground.open-rpc.org/?schemaUrl=https://test.massa.net/api/v2&uiSchema\[appBar\]\[ui:input\]=false&uiSchema\[appBar\]\[ui:inputPlaceholder\]=Enter+Massa+JSON-RPC+server+URL&uiSchema\[appBar\]\[ui:logoUrl\]=https://massa.net/favicons/favicon.ico&uiSchema\[appBar\]\[ui:splitView\]=false&uiSchema\[appBar\]\[ui:darkMode\]=false&uiSchema\[appBar\]\[ui:title\]=Massa&uiSchema\[appBar\]\[ui:examplesDropdown\]=false&uiSchema\[methods\]\[ui:defaultExpanded\]=false&uiSchema\[methods\]\[ui:methodPlugins\]=true&uiSchema\[params\]\[ui:defaultExpanded\]=false)
+
 ## Introduction
 
 [Massa](https://massa.net) is a new blockchain reaching a high
@@ -24,8 +25,9 @@ You can watch a short introduction video [here](https://www.youtube.com/watch?v=
 We are now releasing the **Massa testnet** in this GitHub repository,
 with its explorer available at <https://massa.net/testnet>.
 
-You can interact with Massa JSON-RPC public API on [OpenRPC Playground](https://playground.open-rpc.org/?schemaUrl=https://test.massa.net/api/v2&uiSchema\[appBar\]\[ui:input\]=false&uiSchema\[appBar\]\[ui:inputPlaceholder\]=Enter+Massa+JSON-RPC+server+URL&uiSchema\[appBar\]\[ui:logoUrl\]=https://massa.net/favicons/favicon.ico&uiSchema\[appBar\]\[ui:splitView\]=false&uiSchema\[appBar\]\[ui:darkMode\]=false&uiSchema\[appBar\]\[ui:title\]=Massa&uiSchema\[appBar\]\[ui:examplesDropdown\]=false&uiSchema\[methods\]\[ui:defaultExpanded\]=false&uiSchema\[methods\]\[ui:methodPlugins\]=true&uiSchema\[params\]\[ui:defaultExpanded\]=false) which is an equivalent of SwaggerUI for OpenAPI specifications.
+## Massa API
 
+You can interact with Massa JSON-RPC API via the [interactive API specification](https://playground.open-rpc.org/?schemaUrl=https://test.massa.net/api/v2&uiSchema\[appBar\]\[ui:input\]=false&uiSchema\[appBar\]\[ui:inputPlaceholder\]=Enter+Massa+JSON-RPC+server+URL&uiSchema\[appBar\]\[ui:logoUrl\]=https://massa.net/favicons/favicon.ico&uiSchema\[appBar\]\[ui:splitView\]=false&uiSchema\[appBar\]\[ui:darkMode\]=false&uiSchema\[appBar\]\[ui:title\]=Massa&uiSchema\[appBar\]\[ui:examplesDropdown\]=false&uiSchema\[methods\]\[ui:defaultExpanded\]=false&uiSchema\[methods\]\[ui:methodPlugins\]=true&uiSchema\[params\]\[ui:defaultExpanded\]=false) which is the equivalent of SwaggerUI for OpenRPC specifications.
 
 ## Testnet Incentives