scripts: Change here document delimiters

Fix the outstanding scripts using non standard shell here document delimiters.

This should have been caught by
https://github.com/kata-containers/tests/pull/3937, but there is a bug
in the checker which is fixed on
https://github.com/kata-containers/tests/pull/4569.

Fixes: #3864.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>

tools/osbuilder/scripts/lib.sh

@@ -168,7 +168,7 @@ create_summary_file()
 	local -r agentdir="${script_dir}/../../../"
 	local -r agent_version=$(cat ${agentdir}/VERSION)
 
-	cat >"$file"<<-EOT
+	cat >"$file"<<-EOF
 	---
 	osbuilder:
 	  url: "${osbuilder_url}"
@@ -190,7 +190,7 @@ ${extra}
 	  name: "${AGENT_BIN}"
 	  version: "${agent_version}"
 	  agent-is-init-daemon: "${AGENT_INIT}"
-EOT
+EOF
 
 	local rootfs_file="${file_dir}/$(basename "${file}")"
 	info "Created summary file '${rootfs_file}' inside rootfs"