Add intended line breaks for systemd example docs

Signed-off-by: foreignmeloman <foreignmeloman@gmail.com>

examples/systemd/README.md

@@ -2,8 +2,8 @@
 
 If you are using distribution packages or the copr repository, you don't need to deal with these files!
 
-The unit files (`*.service` and `*.socket`) in this directory are to be put into `/etc/systemd/system`.
-It needs a user named `node_exporter`, whose shell should be `/sbin/nologin` and should not have any special privileges.
-It needs a sysconfig file in `/etc/sysconfig/node_exporter`.
-It needs a directory named `/var/lib/node_exporter/textfile_collector`, whose owner should be `node_exporter`:`node_exporter`.
-A sample file can be found in `sysconfig.node_exporter`.
+The unit files (`*.service` and `*.socket`) in this directory are to be put into `/etc/systemd/system`.<br>
+It needs a user named `node_exporter`, whose shell should be `/sbin/nologin` and should not have any special privileges.<br>
+It needs a sysconfig file in `/etc/sysconfig/node_exporter`.<br>
+It needs a directory named `/var/lib/node_exporter/textfile_collector`, whose owner should be `node_exporter`:`node_exporter`.<br>
+A sample file can be found in `sysconfig.node_exporter`.<br>