Update administration/configuring-fluent-bit/classic-mode/variables.md

Co-authored-by: Alexa Kreizinger <alexakreizinger@gmail.com>
Signed-off-by: Lynette  Miles <6818907+esmerel@users.noreply.github.com>

Author: esmerel

administration/configuring-fluent-bit/classic-mode/variables.md

@@ -12,8 +12,7 @@ ${MY_VARIABLE}
 
 When Fluent Bit starts, the configuration reader will detect any request for `${MY_VARIABLE}` and will try to resolve its value.
 
-When Fluent Bit is running under [`systemd`](https://systemd.io/) (using the official packages), environment
-variables can be set in the following files:
+When Fluent Bit is running under [`systemd`](https://systemd.io/) (using the official packages), environment variables can be set in the following files:
 
 - `/etc/default/fluent-bit` (Debian based system)
 - `/etc/sysconfig/fluent-bit` (Others)