bump up rootlesskit to v0.11.0

Important fix: Lock state dir for preventing automatic clean-up by systemd-tmpfiles
(https://github.com/rootless-containers/rootlesskit/pull/188)

Full changes:https://github.com/rootless-containers/rootlesskit/compare/v0.10.0...v0.11.0

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

hack/dockerfile/install/rootlesskit.installer

@@ -1,7 +1,7 @@
 #!/bin/sh
 
-# v0.10.0
-: ${ROOTLESSKIT_COMMIT:=f766387c3b360bc6dc6c2f353e9e630cf2c6ee86}
+# v0.11.0
+: ${ROOTLESSKIT_COMMIT:=2886253e467c5444a4d2ac7084e53aa3cc50055d}
 
 install_rootlesskit() {
 	case "$1" in