fix(entities): split Slideshare from LinkedIn

Slideshare was acquired from LinkedIn by Scribd in September 2020.
Moving slideshare.com and slidesharecdn.com out of the LinkedIn entity
(where they were added in 2019 commit 86a98e9 while still LinkedIn-
owned) into a new Slideshare entity.

Author: siddharth-kaushik

data/entities.js

@@ -1279,13 +1279,14 @@ module.exports = [
     name: 'LinkedIn',
     homepage: 'https://www.linkedin.com/',
     category: 'social',
-    domains: [
-      '*.bizographics.com',
-      'platform.linkedin.com',
-      '*.slideshare.com',
-      '*.slidesharecdn.com',
-      '*.oribi.io',
-    ],
+    domains: ['*.bizographics.com', 'platform.linkedin.com', '*.oribi.io'],
+  },
+  {
+    name: 'Slideshare',
+    homepage: 'https://www.slideshare.net/',
+    category: 'content',
+    domains: ['*.slideshare.com', '*.slideshare.net', '*.slidesharecdn.com'],
+    examples: ['public.slidesharecdn.com', 'image.slidesharecdn.com', 'www.slideshare.net'],
   },
   {
     name: 'LinkedIn Ads',