Updated Abstract headings #1357

Job	Run time
select-dc-files	52s
validate (./DC-alp-dolomite ./DC-bci-variants ./DC-cockpit-alp-dolomite ./DC-cockpit-slemicro ./D...	1m 15s
validate (./DC-concept-klp ./DC-concept-manage-virtual-machines-libvirt ./DC-concept-securing-wit...	54s
validate (./DC-concept-virtualization ./DC-concept-zypper ./DC-forward-root-mail ./DC-minvm-intro...	51s
validate (./DC-reference-connection-accounting-utilities ./DC-reference-managing-systemd-targets-...	1m 4s
validate (./DC-SLE-Micro-admin ./DC-SLE-Micro-public-cloud ./DC-sudo-run-commands-as-superuser ./...	56s
validate (./DC-task-check-cpu-temperature ./DC-task-configure-network-bonding ./DC-task-configure...	50s
validate (./DC-task-debug-failed-systemd-services ./DC-task-delete-modules-extensions ./DC-task-i...	1m 0s
validate (./DC-task-send-termination-signals-systemd ./DC-task-setup-free-radius-server ./DC-task...	1m 16s
build-html	0s
publish	0s
	8m 58s

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