Update llamaindex.md

clarified description to match style of other files

content/opensource_packages/llamaindex.md

@@ -1,7 +1,7 @@
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 name: LlamaIndex Core
 category: AI/ML
-description: The core python package to the LlamaIndex library, which is a simple, flexible data framework for connecting custom data sources to large language models.
+description: LlamaIndex Core is the core python package to the LlamaIndex library, which is a simple, flexible data framework for connecting custom data sources to large language models.
 download_url: https://pypi.org/project/llama-index-core/#history
 works_on_arm: true
 supported_minimum_version: