Update README.md

Author: yuhsukeogawa

README.md

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 # Network Sketcher
-**Network Sketcher generates network configuration diagrams in PowerPoint and manages configuration information in Excel. Additionally, exporting the AI ​​context can be used to generate config files using LLM.**
+**Network Sketcher generates network configuration diagrams in PowerPoint and manages configuration information in Excel. Additionally, exporting a AI ​​context can be used to generate config files using LLM.**
 * Automatic generation of each configuration document by metadatization of network configuration information
 * Automated synchronization between documents
 * Minimize maintenance and training load by automatic generation of common formats