Minor tweaks in data update.json files

* remove extra newlines
* add missing trailing slashes to URLs
* link to abuse.ch

data/KADhosts/update.json

@@ -1,7 +1,7 @@
 {
     "name": "KADhosts",
     "description": "Fraud/adware/scam websites.",
-    "homeurl": "https://kadantiscam.netlify.com",
+    "homeurl": "https://kadantiscam.netlify.com/",
     "frequency": "frequently",
     "issues": "https://github.com/PolishFiltersTeam/KADhosts/issues",
     "url": "https://raw.githubusercontent.com/PolishFiltersTeam/KADhosts/master/KADhosts_without_controversies.txt",

data/URLHaus/update.json

@@ -1,6 +1,6 @@
 {
     "name": "URLHaus",
-    "description": "A project from abuse.ch with the goal of sharing malicious URLs.",
+    "description": "A project from [abuse.ch](https://abuse.ch/) with the goal of sharing malicious URLs.",
     "homeurl": "https://urlhaus.abuse.ch/",
     "frequency": "weekly",
     "issues": "mailto:cosntacptamem@abuse.ch",

data/someonewhocares.org/update.json

@@ -1,5 +1,5 @@
 {
-    "name": "Dan Pollock – [someonewhocares](https://someonewhocares.org)",
+    "name": "Dan Pollock – [someonewhocares](https://someonewhocares.org/)",
     "description": "How to make the internet not suck (as much).",
     "homeurl": "https://someonewhocares.org/hosts/",
     "frequency": "frequently",

data/yoyo.org/update.json

@@ -6,5 +6,3 @@
     "issues": "mailto:pgl@yoyo.org",
     "url": "https://pgl.yoyo.org/adservers/serverlist.php?hostformat=hosts&mimetype=plaintext&useip=0.0.0.0"
 }
-
-