doc: semihosting: update semihosting spec link

Replace dead link in semihosting documentation.

Fix #88206

Signed-off-by: Gaetan Perrot <gaetan.perrot@spacecubics.com>

Author: moonlight83340

doc/hardware/arch/semihost.rst

@@ -68,5 +68,5 @@ API Reference
 .. doxygengroup:: semihost
 
 .. _ARM Github documentation: https://github.com/ARM-software/abi-aa/blob/main/semihosting/semihosting.rst
-.. _RISC-V Github documentation: https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc
+.. _RISC-V Github documentation: https://github.com/riscv-non-isa/riscv-semihosting/blob/main/riscv-semihosting.adoc
 .. _GDB File-I/O Remote Protocol: https://sourceware.org/gdb/current/onlinedocs/gdb.html/File_002dI_002fO-Remote-Protocol-Extension.html