Fix grammatical errors from plural naming change

Address grammar issues identified in PR anthropics#199 review:
- Fix "Claude Cookbooks with its" → "with their" (possessive pronoun agreement)
- Fix "The Claude Cookbooks provides" → "provide" (subject-verb agreement)
- Fix "The Claude Cookbooks is" → "are" (subject-verb agreement)

These changes ensure proper grammar throughout the codebase following
the renaming from "Claude Cookbook" to "Claude Cookbooks".

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: zealoushacker

README.md

@@ -1,6 +1,6 @@
 # Claude Cookbooks
 
-The Claude Cookbooks provides code and guides designed to help developers build with Claude, offering copy-able code snippets that you can easily integrate into your own projects.
+The Claude Cookbooks provide code and guides designed to help developers build with Claude, offering copy-able code snippets that you can easily integrate into your own projects.
 
 ## Prerequisites
 

skills/retrieval_augmented_generation/data/anthropic_summary_indexed_docs.json

@@ -225,7 +225,7 @@
     "chunk_link": "https://docs.claude.com/en/docs/build-with-claude/text-generation#anthropic-cookbook",
     "chunk_heading": "Claude Cookbooks",
     "text": "Claude Cookbooks\n\n\nDive into practical examples and hands-on tutorials with our collection of Jupyter notebooks.\nPDF Upload & SummarizationLearn how to upload PDFs and have Claude summarize their content, making it easy to digest long documents.Tool Use & Function CallingDiscover how to extend Claude\u2019s capabilities by integrating external tools and functions into your workflows.Embeddings with VoyageAIExplore how to create and use embeddings with VoyageAI for advanced text similarity and search tasks.\nPDF Upload & SummarizationLearn how to upload PDFs and have Claude summarize their content, making it easy to digest long documents.\n\nPDF Upload & Summarization\nLearn how to upload PDFs and have Claude summarize their content, making it easy to digest long documents.\nTool Use & Function CallingDiscover how to extend Claude\u2019s capabilities by integrating external tools and functions into your workflows.\n\nTool Use & Function Calling\nDiscover how to extend Claude\u2019s capabilities by integrating external tools and functions into your workflows.\nEmbeddings with VoyageAIExplore how to create and use embeddings with VoyageAI for advanced text similarity and search tasks.\n\nEmbeddings with VoyageAI\nExplore how to create and use embeddings with VoyageAI for advanced text similarity and search tasks.\n",
-    "summary": "The Claude Cookbooks provides practical examples and hands-on tutorials, including how to upload PDFs and have Claude summarize their content, how to extend Claude's capabilities by integrating external tools and functions, and how to create and use embeddings with VoyageAI for advanced text similarity and search tasks."
+    "summary": "The Claude Cookbooks provide practical examples and hands-on tutorials, including how to upload PDFs and have Claude summarize their content, how to extend Claude's capabilities by integrating external tools and functions, and how to create and use embeddings with VoyageAI for advanced text similarity and search tasks."
   },
   {
     "chunk_link": "https://docs.claude.com/en/docs/build-with-claude/text-generation#more-resources",