Add list of context file from released versions

Co-Authored-By: Stian Soiland-Reyes <[email protected]>

Author: 2 people

content/jsonld.md

@@ -11,7 +11,13 @@ JSON-LD lead developer Manu Sporny explains how JSON-LD works in this short clip
 
 [![W3IDCodeMeta v3](https://img.shields.io/badge/W3ID-CodeMeta_v3-blue)](https://w3id.org/codemeta/3.0)
 
-The current CodeMeta context file can be found at[`https://w3id.org/codemeta/3.0`](https://w3id.org/codemeta/3.0).
+Context file of released versions:
+
+- CodeMeta 3.0: <https://w3id.org/codemeta/3.0>
+- CodeMeta 2.0: <https://doi.org/10.5063/schema/codemeta-2.0>
+- CodeMeta 1.0: <https://doi.org/10.5063/schema/codemeta-1.0>
+
+## CodeMeta terms
 
 CodeMeta properties are built on and extend software properties from
 <https://schema.org>.