Update README with json-rpc details and corrections

Corrected spelling of 'json/rpc' to 'json-rpc' and added details about json-rpc methods and format.

Author: twr14152

srlinux/README.md

@@ -8,14 +8,32 @@ Links:
 These devices are built on yang models so in theory it will help me better understand model driven programmability.
 
 SR Linux has a couple of interfaces you can use for programmability:
-* json/rpc sever - Use requests library to interface with this server for device configuration and management.
+* json-rpc sever - Use requests library to interface with this server for device configuration and management.
 * gRPC server- Uses gNMI for device configuration and telemetry
 
 Lab set up to get familiar with the interface Cli, as well as the two programmabile interfaces:
 
  sw1 (rid 1.1.1.1) eth-1/1.0 (192.168.0.0/31) <----> (192.168.0.1/31) eth-1/1.0 (rid 2.2.2.2) sw2
+### json-rpc 
+method options
+* get - Used to retrieve configuration and state details from the system.
+* set - Used to set a configuration or run operational transaction. The set method can be used with the candidate and tools datastores.
+* validate - Used to verify that the system accepts a configuration transaction before applying it to the system.
+* cli - Used to run CLI commands. The get and set methods are restricted to accessing data structures via the YANG models, but the cli method can access any commands added to the system via python plug-ins or aliases.
+
+format
+```
+  {
+"jsonrpc": "2.0",
+"id": 0,
+"method": "get", 
+"params": {
+}
+}
+```
+https://documentation.nokia.com/srlinux/25-10/books/system-mgmt/json-interface.html
+
 
-json/rpc
 - json_rpc/update_intf_description.py - update interface config
 - json_rpc/enable_ospf.py - build the ospf
 - json_rpc/get_info.py - validation code