fix: also ship crun arm64 binary instead of amd64

Dockerfile

@@ -166,10 +166,11 @@ COPY --from=runc   /usr/local/bin/runc   /usr/local/bin/runc
 # Download crun
 # (switched keyserver from sks to ubuntu since sks is offline now and gpg refuses to import keys from keys.openpgp.org because it does not provide a user ID with the key.)
 FROM gpg AS crun
-ARG CRUN_VERSION=1.12
+ARG CRUN_VERSION=1.13
 RUN set -ex; \
-	wget -O /usr/local/bin/crun https://github.com/containers/crun/releases/download/$CRUN_VERSION/crun-${CRUN_VERSION}-linux-amd64-disable-systemd; \
-	wget -O /tmp/crun.asc https://github.com/containers/crun/releases/download/$CRUN_VERSION/crun-${CRUN_VERSION}-linux-amd64-disable-systemd.asc; \
+	ARCH="`uname -m | sed 's!x86_64!amd64!; s!aarch64!arm64!'`"; \
+	wget -O /usr/local/bin/crun https://github.com/containers/crun/releases/download/$CRUN_VERSION/crun-${CRUN_VERSION}-linux-${ARCH}-disable-systemd; \
+	wget -O /tmp/crun.asc https://github.com/containers/crun/releases/download/$CRUN_VERSION/crun-${CRUN_VERSION}-linux-${ARCH}-disable-systemd.asc; \
 	gpg --keyserver hkps://keyserver.ubuntu.com --recv-keys 027F3BD58594CA181BB5EC50E4730F97F60286ED; \
 	gpg --batch --verify /tmp/crun.asc /usr/local/bin/crun; \
 	chmod +x /usr/local/bin/crun; \