Add 'which' package to installation in Dockerfiles for Debian and Rocky9

debian13/Dockerfile

@@ -16,6 +16,7 @@ RUN sed -i 's|deb.debian.org|mirrors.ustc.edu.cn|g' /etc/apt/sources.list.d/debi
         libtool \
         ninja-build \
         pkg-config \
+        which \
         makeself \
     && rm -rf /var/lib/apt/lists/*
 

rocky9/Dockerfile

@@ -21,6 +21,7 @@ RUN dnf install --assumeyes --enablerepo=crb \
         rpm-build \
         tar \
         xz \
+        which \
         epel-release \
     && dnf install --assumeyes \
         makeself \