Update external XSLT links and move them to the guide (mdn#40591)

The "Hands-on XSL" article is no longer hosted at
developer.ibm.com

Author: mathewhodson

files/en-us/web/api/xsltprocessor/index.md

@@ -330,6 +330,3 @@ async function sort() {
 
 - [XSLT](/en-US/docs/Web/XML/XSLT)
 - [Transforming with XSLT](/en-US/docs/Web/XML/XSLT/Guides/Transforming_XML_with_XSLT)
-- [Chapter 15 of the XML 1.1 Bible: XSL Transformations](https://www.ibiblio.org/xml/books/bible3/chapters/ch15.html)
-- [XSLT Tutorial](https://zvon.org/xxl/XSLTutorial/Books/Book1/index.html) at [zvon.org](https://zvon.org/)
-- [XPath Tutorial](https://zvon.org/xxl/XPathTutorial/General/examples.html) at [zvon.org](https://zvon.org/)

files/en-us/web/xml/xslt/guides/transforming_xml_with_xslt/index.md

@@ -355,11 +355,13 @@ The final XSLT stylesheet looks as follows:
 
 ### Articles
 
-- [Hands-on XSL](https://developer.ibm.com/technologies/web-development/) by Don R. Day
+- [XSL Transformations](https://www.ibiblio.org/xml/books/bible3/chapters/ch15.html) by Elliotte Rusty Harold
 - [What is XSLT?](https://www.xml.com/pub/a/2000/08/holman/index.html) by G. Ken Holman
 
 ### Tutorials/Examples
 
 - [Jeni's XSLT Pages](https://www.jenitennison.com/xslt/)
 - [XMLPitstop.com](https://web.archive.org/web/20211209064736/https://www.xmlpitstop.com/default_datatype_SSC.html)
-- [XSL Tutorial](https://nwalsh.com/docs/tutorials/xsl/)
+- [XPath Tutorial](https://zvon.org/xxl/XPathTutorial/General/examples.html) by Miloslav Nic, Jiri Jirat
+- [XSL Tutorial](https://nwalsh.com/docs/tutorials/xsl/) by Paul Grosso, Norman Walsh
+- [XSLT Tutorial](https://zvon.org/xxl/XSLTutorial/Books/Book1/index.html) by Miloslav Nic