Update scale requirements in README.md

[paramasivamn1]

Update scale requirements in README.md

[gemini-code-assist]

Summary of Changes

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This pull request updates the scale testing parameters and documentation within the AFT prefix filtering resilience test suite. The changes ensure that the test environment documentation aligns with current scale requirements and provides more accurate guidance on prefix filtering and collector verification.

Highlights

• Scale Requirements Update: Increased the default number of IPv4 and IPv6 routes for scale testing in the README to 1,500,000 and 500,000 respectively.
• Documentation Clarification: Updated prefix-set configuration details and clarified verification steps for gNMI collectors to better reflect expected behavior.

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[OpenConfigBot]

Pull Request Functional Test Report for #5607 / 8ce352f

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience	c6094659	Log
Cisco 8000E		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience	3b436a95	Log
Cisco XRd		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience	36607926	Log
Juniper ncPTX		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience	8fb17cef	Log
Nokia SR Linux		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience	ce0532c9	Log
Openconfig Lemming		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience	17bb09fc	Log

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience
Cisco 8808		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience
Juniper PTX10008		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience
Nokia 7250 IXR-10e		AFT-6.1: AFT Prefix Filtering AFT-6.3: AFT Prefix Filtering Resilience

Help

[gemini-code-assist]

Code Review

This pull request updates the scale test parameters and routing policy details in the README.md for the AFT prefix filtering resilience test, significantly increasing the default IPv4 and IPv6 route scale and clarifying prefix-set configurations. The review feedback highlights several grammatical issues in the updated documentation, such as awkward phrasing, incorrect verb agreement ('Matches includes'), and a duplicate word ('of of').

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[gemini-code-assist]

There is a duplicate 'of' in 'receipt of of allowed prefixes'. It should be 'receipt of allowed prefixes'.

References

1. Ensure correct grammar, including subject-verb agreement and proper use of singular/plural forms.