Tool hyperlinks

Author: ilarsf

docs/other-support/xml-upload/quality-control.md

@@ -36,7 +36,7 @@ After uploading:
 
 This repo includes a browser-based tool and a CLI script to catch common formatting issues:
 
-- Browser tool: open `tools/index.html` from this repo and drag/drop your XML.
+- Browser tool: [Open the validator]({{ site.baseurl }}/tools/) and drag/drop your XML.
 - CLI script:
 
 ```bash

docs/other-support/xml-upload/validator.md

@@ -9,6 +9,6 @@ nav_order: 4
 Use this tool to check for the most common CPOS XML upload issues before SciENcv.
 It runs entirely in your browser; files are not uploaded anywhere.
 
-Open the browser-based validator by opening `tools/index.html` from this repo in a browser.
+[Open the browser-based validator]({{ site.baseurl }}/tools/)
 
 If you prefer a command-line check, see the script in `tools/validate_cpos_xml.py`.