Merge bitcoin/bitcoin#24733: build: Fix "ERR: Unsigned tarballs do not exist"

7762c5683f build: Fix "ERR: Unsigned tarballs do not exist" (Hennadii Stepanov)

Pull request description:

  This was missed in 53dd6165b8 (bitcoin/bitcoin#24549).

ACKs for top commit:
  laanwj:
    ACK 7762c5683f
  fanquake:
    ACK 7762c5683f - this should have been a part of #24549.

Tree-SHA512: 526e4e6ee1463003059b9703030c5b0537445783c45a205024c9c9e3493da967733153a1dc80594fed15a336805c1cf14c8d13cd106186a7544f51d0d542f335

contrib/guix/guix-codesign

@@ -152,7 +152,7 @@ outdir_for_host() {
 unsigned_tarball_for_host() {
     case "$1" in
         *mingw*)
-            echo "$(outdir_for_host "$1")/${DISTNAME}-win-unsigned.tar.gz"
+            echo "$(outdir_for_host "$1")/${DISTNAME}-win64-unsigned.tar.gz"
             ;;
         *darwin*)
             echo "$(outdir_for_host "$1")/${DISTNAME}-${1}-unsigned.tar.gz"