docs/about/emulation: Fix broken link

semihosting link to risc-v changed

Signed-off-by: Santiago Monserrat Campanello <santimonserr@gmail.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2717
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250305102632.91376-1-santimonserr@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
(cherry picked from commit 672cb29d1e)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

docs/about/emulation.rst

@@ -185,7 +185,7 @@ for that architecture.
     - https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;a=blob;f=libgloss/nios2/nios2-semi.txt;hb=HEAD
   * - RISC-V
     - System and User-mode
-    - https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc
+    - https://github.com/riscv-non-isa/riscv-semihosting/blob/main/riscv-semihosting.adoc
   * - Xtensa
     - System
     - Tensilica ISS SIMCALL