[BUG] Example configurations needed in notebooks.

[mkoivi]

Describe the bug

Quickstart.ipynb:

• file_directory: a local directory of text files. The file structure should be flat,
  with no nested directories. (i.e. file_directory/file1.txt, file_directory/file2.txt, etc.)
• storage_name: a unique name to identify a blob storage container in Azure where files
  from file_directory will be uploaded.
• index_name: a unique name to identify a single graphrag knowledge graph index.
  Note: Multiple indexes may be created from the same storage_name blob storage container.
• endpoint: the base/endpoint URL for the GraphRAG API (this is the Gateway URL found in the APIM resource).

Please provide example values for each variable. For example ' a unique name to identify a blob storage container in Azure ' is misleading - container endpoint URL does not seems to be correct here.

[timothymeyers]

related to #127