Translations update from Weblate (#5026)

* [Web] Updated lang.en-gb.json

Co-authored-by: Peter <magic@kthx.at>

* [Web] Updated lang.de-de.json

Co-authored-by: Peter <magic@kthx.at>

* [Web] Updated lang.sk-sk.json

Co-authored-by: Lukáš Matula <lukas@gbely.net>
Co-authored-by: milkmaker <milkmaker@mailcow.de>

Co-authored-by: Peter <magic@kthx.at>
Co-authored-by: Lukáš Matula <lukas@gbely.net>

data/web/lang/lang.en-gb.json

@@ -468,7 +468,7 @@
     },
     "datatables": {
         "collapse_all": "Collapse All",
-        "decimal": "",
+        "decimal": ".",
         "emptyTable": "No data available in table",
         "expand_all": "Expand All",
         "info": "Showing _START_ to _END_ of _TOTAL_ entries",