doc: board: phytec: phycore-am62x: Fix Link to Documentation

We moved our documentation to another hoster and therefore the URL
changed. Point to the latest documentation instead of release versions
to not link out-dated documentation.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
diff --git a/doc/board/phytec/phycore-am62x.rst b/doc/board/phytec/phycore-am62x.rst
index bc6d524..681ac53 100644
--- a/doc/board/phytec/phycore-am62x.rst
+++ b/doc/board/phytec/phycore-am62x.rst
@@ -155,4 +155,4 @@
 -------------------
 
 Please see :doc:`../ti/am62x_sk` chapter for further AM62 SoC related documentation
-and https://docs.phytec.com/phycore-am62x for vendor documentation.
+and https://docs.phytec.com/projects/yocto-phycore-am62x/en/latest/ for vendor documentation.