feat: add AMAWeb validator

Author: brunopulis

topics/tools.md

@@ -93,6 +93,7 @@
 | Validator | Description
 | --- | --- |
 |[Access Monitor](http://accessmonitor.acessibilidade.gov.pt/)|Validator|
+|[AMA Web](https://amaweb.unifesp.br/) | Validator PT-BR |
 |[ExcellentWebCheck](https://excellentwebcheck.com/website-accessibility-checker)|Mobile, Tablet and Desktop Accessibility Checker & Monitor|
 |[Google Lighthouse](https://developers.google.com/web/tools/lighthouse/)|Google Chrome tool for web page audits
 |[Sim Daltonism](https://michelf.ca/projects/sim-daltonism/)|A color blindness simulator for Mac and iOS