Updating testnet endpoints for Glif nodes (#309)

* Updating testnet endpoints for Glif nodes

* Clarifies what the `v1` endpoint is.

Co-authored-by: Johnny <[email protected]>

Author: witnsby

.gitignore

@@ -5,3 +5,7 @@ resources
 .netlify
 TODO
 .DS_Store
+
+# JetBrains IDE
+.idea/
+

content/en/developers/glif-nodes.md

@@ -25,10 +25,13 @@ Unlike bare Lotus, the endpoint above is hardened and limited:
 
 ## Testnet endpoint
 
-Testnet nodes using the [JSON RPC API]({{< relref "/reference/basics/overview" >}}) can use `https://dev.node.glif.io/calibrationapi/lotus/rpc/v0`.
+Testnet nodes using the [JSON RPC API]({{< relref "/reference/basics/overview" >}}) can use `https://api.calibration.node.glif.io/rpc/v0`.
 - Only the _latest_ 2000 blocks are available on public endpoints. This is due to the limitation of [lightweight-snapshots]({{< relref "chain-management" >}}).
 - `Filecoin.StateMarketDeals` operation data is available as a [direct link to an AWS S3 bucket](https://marketdeals.s3.amazonaws.com/StateMarketDeals.json). `StateMarketDeals` data is refreshed every 10 minutes.
 
+- {{< alert icon="tip" >}}
+You can use the `v1` JSON RPC API with `https://api.calibration.node.glif.io/rpc/v1`
+{{< /alert >}}
 
 ### Custom endpoints