Add more test documentation resources

Author: pengqun

README.md

@@ -259,14 +259,16 @@ README files are a staple of any code project. They provide the first introducti
   - [IEEE Test Plan Template](https://github.com/JennifferLockwood/test_plan_template) - IEEE 829 templates in HTML5 and Markdown formats.
   - [SONiC Test Plan Template](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20Test%20Plan%20Template.md) - A test plan template from Software for Open Networking in the Cloud (SONiC).
   - [Writing Test Plan Items | VS Code](https://github.com/microsoft/vscode/wiki/Writing-Test-Plan-Items) - A guide for writing Test Plan Item (TPI) for VS Code project.
+  - [Performance Test Plan Document](https://www.perfmatrix.com/performance-test-plan-document-template/) -  A free .docx template for performance test plan from PerfMatrix.
 - Test Cases
   - [TestCases and Templates for Manual Software Testing](https://github.com/mfaisalkhatri/Manual_Testing) - General Test Cases for performing Manual Testing and API Testing on the Web/Mobile application.
   - [Test Case Template (Download Sample Excel)](https://www.guru99.com/download-sample-test-case-template-with-explanation-of-important-fields.html) - A free test case template from Guru99, with both Excel and Word formats.
   - [Test Case Template with Examples: Free Excel & Word Sample for Download](https://katalon.com/resources-center/blog/test-case-template-examples) - A free test case template from Katalon, with guidelines and direct download links.
 - Test Report
   - [Bug report template](https://gitlab.com/tgdp/templates/-/blob/main/bug-report/template-bug-report.md) - Open-source template provided by The Good Docs Project.
-- Coverage
-- Performance
+  - [Performance Test Report Template](https://www.perfmatrix.com/performance-test-report-template/) - A free .docx template for performance test report from PerfMatrix.
+  - [Performance Testing Results Report: How to Write It (with Example)](https://u-tor.com/topic/performance-testing-report) - A guide on performance testing report, including why, how and a real world example.
+  - [A Step-by-Step Guide to Creating a Powerful Performance Summary Report](https://www.linkedin.com/pulse/step-by-step-guide-creating-powerful-performance-summary-james-ohia/) - Discuss the best practices for creating a performance test summary report and the key components that should be included in it, with a full example.
 
 ### Other Types