Fix typo: Rename 'sys_client_script' to 'sys_script_client'

[RBracke]

Problem: > The table name sys_client_script is used incorrectly in agentinstructions.md
Solution: > Update this value to the correct ServiceNow table name: sys_script_client

sn-scriptsync/agentrules/agentinstructions.md

Line 117 in 80e1a13

| Client Script | `sys_client_script` | Global + Scoped |