- fix: rssReader support customized user-agent

[jingyi-zhao-01]

Description

• some rss sources implement cloudflare to prevent being abused, such as rsshub
• by allow the feedparser to accccept a user-agent, this problem can be eliminated

Fixes # (issue)

New Package?

No

Did I fill in the tool.llamahub section in the pyproject.toml and provide a detailed README.md for my new integration or package?

• Yes
• No

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes
• No

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran make format; make lint to appease the lint gods

[jingyi-zhao-01]

i got stuck on the rule of naming on testcases, do we have any docs on that ?

_ ERROR collecting llama-index-integrations/readers/llama-index-readers-web/tests/test_readers_rss.py _
ImportError while importing test module 'llama-index-integrations/readers/llama-index-readers-web/tests/test_readers_rss.py'.
Hint: make sure your test modules/packages have valid Python names.