czechlight-cfg-fs: move install YANG executable to /usr/libexec

Change-Id: Ia39ee231a16153d01179d9d72b75f15ff72dbfff
diff --git a/package/czechlight-cfg-fs/czechlight-install-yang.service b/package/czechlight-cfg-fs/czechlight-install-yang.service
index 4588f71..e34aee2 100644
--- a/package/czechlight-cfg-fs/czechlight-install-yang.service
+++ b/package/czechlight-cfg-fs/czechlight-install-yang.service
@@ -7,7 +7,7 @@
 [Service]
 Type=oneshot
 RemainAfterExit=yes
-ExecStart=/bin/bash /usr/bin/czechlight-install-yang.sh
+ExecStart=/bin/bash /usr/libexec/czechlight-cfg-fs/czechlight-install-yang.sh
 Group=sysrepo
 
 [Install]