- minor: added missing markup line break

README.md

@@ -14,7 +14,7 @@ NOTE: The use of option `copy` is strongly recommended. The remaining options mo
 1. Update system packages (optional but recommended):  
    `sudo apt update && sudo apt upgrade -y`
 2. Install required tools and libraries:  
-   `sudo apt install -y build-essential git perl libperl-dev liblwp-protocol-https-perl libfile-copy-recursive-perl libmarc-record-perl libxml-libxml-perl libxml-xpath-perl libdatetime-format-iso8601-perl cpanminus`
+   `sudo apt install -y build-essential git perl libperl-dev liblwp-protocol-https-perl libfile-copy-recursive-perl libmarc-record-perl libxml-libxml-perl libxml-xpath-perl libdatetime-format-iso8601-perl cpanminus`  
    `sudo cpanm Archive::BagIt`
 3. Download latest SLUB SIP Builder:  
    `git clone https://git.slub-dresden.de/digital-preservation/SLUB_SIP_Builder.git`  
@@ -152,4 +152,4 @@ perl t/slubsipbuilderbagit.t
 or
 ```perl
 prove t
-```
\ No newline at end of file
+```