fix: regex error

displaylink-debian.sh

@@ -23,10 +23,10 @@ echo "$@" | awk -F "." '{ printf("%03d%03d%03d\n", $1,$2,$3); }';
 }
 
 # Get latest versions
-versions=$(wget -q -O - https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu | grep "<p>Release: " | head -n 2 | perl -pe '($_)=/([0-9]+([.][0-9]+)+(\ Beta)*)/')
+versions=$(wget -q -O - https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu | grep "<p>Release: " | head -n 2 | perl -pe '($_)=/([0-9]+([.][0-9]+)+(\ Beta)*)/; exit if $. > 1;')
 # if versions contains "Beta", try to download previous version
 if [[ $versions =~ Beta ]]; then
-    version=$(wget -q -O - https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu | grep "<p>Release: " | head -n 2 | perl -pe '($_)=/([0-9]+([.][0-9]+)+(?!\ Beta))/')
+    version=$(wget -q -O - https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu | grep "<p>Release: " | head -n 2 | perl -pe '($_)=/([0-9]+([.][0-9]+)+(?!\ Beta))/; exit if $. > 1;')
     dlurl="https://www.synaptics.com/$(wget -q -O - https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu | grep -B 2 $version'-Release' | perl -pe '($_)=/<a href="\/([^"]+)"[^>]+class="download-link"/')"
     driver_url="https://www.synaptics.com/$(wget -q -O - ${dlurl} | grep '<a class="no-link"' | head -n 1 | perl -pe '($_)=/href="\/([^"]+)"/')"
 else