update hoard to current (2025-07-18) HEAD

hoard has not released any version since 2019 but development is ongoing. Our CI failures seem to be fixed upstream, so switch to current HEAD

Author: derSteFfi

build-bench-env.sh

@@ -41,7 +41,7 @@ readonly version_dh=master
 readonly version_ff=master   # ~unmaintained since 2021
 readonly version_fg=master   # ~unmaintained since 2018
 readonly version_gd=master   # ~unmaintained since 2021
-readonly version_hd=5afe855  # 3.13 #a43ac40 #d880f72  #9d137ef37
+readonly version_hd=6577c22b # HEAD as of 2025-07-18, no release since 2019
 readonly version_hm=11
 readonly version_iso=1.2.5
 readonly version_je=5.3.0