Add `forums.lanik.us` as a valid location for subscription links

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1246

platform/chromium/manifest.json

@@ -47,6 +47,7 @@
       "matches": [
         "https://easylist.to/*",
         "https://filterlists.com/*",
+        "https://forums.lanik.us/*",
         "https://github.com/*",
         "https://*.github.io/*"
       ],

platform/firefox/manifest.json

@@ -57,6 +57,7 @@
       "matches": [
         "https://easylist.to/*",
         "https://filterlists.com/*",
+        "https://forums.lanik.us/*",
         "https://github.com/*",
         "https://*.github.io/*"
       ],

platform/opera/manifest.json

@@ -47,6 +47,7 @@
       "matches": [
         "https://easylist.to/*",
         "https://filterlists.com/*",
+        "https://forums.lanik.us/*",
         "https://github.com/*",
         "https://*.github.io/*"
       ],

platform/thunderbird/manifest.json

@@ -38,6 +38,7 @@
       "matches": [
         "https://easylist.to/*",
         "https://filterlists.com/*",
+        "https://forums.lanik.us/*",
         "https://github.com/*",
         "https://*.github.io/*"
       ],

platform/webext/manifest.json

@@ -51,6 +51,7 @@
       "matches": [
         "https://easylist.to/*",
         "https://filterlists.com/*",
+        "https://forums.lanik.us/*",
         "https://github.com/*",
         "https://*.github.io/*"
       ],