Update competencies.adoc (#99)

modifying link to WIS Guide to point to the library record that includes references to the other language versions.

guide/sections/part5/competencies.adoc

@@ -1,3 +1,3 @@
 === Competencies
 
-For this initial version of the Guide to WIS 2.0, existing guidance on competencies remains largely in force. Please refer to _Guide to the WMO Information System_ (WMO-No. 1061), Vol I, Appendix A - WMO Information System Training And Learning Guidefootnote:[_Guide to the WMO Information System_ (WMO-No. 1061), Vol I, Appendix A - WMO Information System Training And Learning Guide: https://library.wmo.int/idviewer/28988/76].
+For this initial version of the Guide to WIS 2.0, existing guidance on competencies remains largely in force. Please refer to _Guide to the WMO Information System_ (WMO-No. 1061), Vol I, Appendix A - WMO Information System Training And Learning Guidefootnote:[_Guide to the WMO Information System_ (WMO-No. 1061), Vol I: https://library.wmo.int/records/item/28988-guide-to-the-wmo-information-system].