fix: correct typo in README - 'able' to 'agent' (#500)

Fixed typo in the main README description where 'giving the able access'
should be 'giving the agent access to a shell and a filesystem'.

Author: Ghazi-raad

README.md

@@ -1,6 +1,6 @@
 # 🚀🧠 Deep Agents
 
-Agents can increasingly tackle long-horizon tasks, [with agent task length doubling every 7 months](https://metr.org/blog/2025-03-19-measuring-ai-ability-to-complete-long-tasks/)! But, long horizon tasks often span dozens of tool calls, which present cost and reliability challenges. Popular agents such as [Claude Code](https://code.claude.com/docs) and [Manus](https://www.youtube.com/watch?v=6_BcCthVvb8) use some common principles to address these challenges, including **planning** (prior to task execution), **computer access** (giving the able access to a shell and a filesystem), and **sub-agent delegation** (isolated task execution). `deepagents` is a simple agent harness that implements these tools, but is open source and easily extendable with your own custom tools and instructions.
+Agents can increasingly tackle long-horizon tasks, [with agent task length doubling every 7 months](https://metr.org/blog/2025-03-19-measuring-ai-ability-to-complete-long-tasks/)! But, long horizon tasks often span dozens of tool calls, which present cost and reliability challenges. Popular agents such as [Claude Code](https://code.claude.com/docs) and [Manus](https://www.youtube.com/watch?v=6_BcCthVvb8) use some common principles to address these challenges, including **planning** (prior to task execution), **computer access** (giving the agent access to a shell and a filesystem), and **sub-agent delegation** (isolated task execution). `deepagents` is a simple agent harness that implements these tools, but is open source and easily extendable with your own custom tools and instructions.
 
 <img src=".github/images/deepagents_banner.png" alt="deep agent" width="100%"/>