Included Gambling website data from the Polish hazard.mf.gov.pl list (

#2041)

* Refreshed the Belgium Gambling Site list data

Unfortunately some hostnames have been removed from that list,
which means they are disappearing from the `ndpi_gambling_match.c.inc`
file as well.

* build: added `libxml2-utils` (for `xmllint`)

* Included Gambling website data from the Polish `hazard.mf.gov.pl` list

The list contains over 30k gambling website hostnames as of today.

.github/workflows/build.yml

@@ -53,7 +53,7 @@ jobs:
       - name: Install Ubuntu Prerequisites
         run: |
           sudo apt-get update
-          sudo apt-get install python3-netaddr git whois
+          sudo apt-get install python3-netaddr git whois libxml2-utils
       - name: Run Scripts
         run: |
           echo 'Running ./utils/bitcoinnodes.sh'