Add Zhihu icon (#1889) (#1959)

* Added zhihu.svg

* Updated _data/simple-icons.json

* Corrected hex value

* Changed hex value to use caps

_data/simple-icons.json

@@ -4072,6 +4072,11 @@
             "hex": "9DBC7A",
             "source": "https://zerply.com/about/resources"
         },
+        {
+            "title": "Zhihu",
+            "hex": "0084FF",
+            "source": "https://www.zhihu.com/"
+        },
         {
             "title": "Zillow",
             "hex": "0074E4",

icons/zhihu.svg

@@ -0,0 +1 @@
+<svg role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><title>Zhihu icon</title><path d="M5.721 0C2.251 0 0 2.25 0 5.719V18.28C0 21.751 2.252 24 5.721 24h12.56C21.751 24 24 21.75 24 18.281V5.72C24 2.249 21.75 0 18.281 0zm1.964 4.078c-.271.73-.5 1.434-.68 2.11h4.587c.545-.006.445 1.168.445 1.171H9.384a58.104 58.104 0 01-.112 3.797h2.712c.388.023.393 1.251.393 1.266H9.183a9.223 9.223 0 01-.408 2.102l.757-.604c.452.456 1.512 1.712 1.906 2.177.473.681.063 2.081.063 2.081l-2.794-3.382c-.653 2.518-1.845 3.607-1.845 3.607-.523.468-1.58.82-2.64.516 2.218-1.73 3.44-3.917 3.667-6.497H4.491c0-.015.197-1.243.806-1.266h2.71c.024-.32.086-3.254.086-3.797H6.598c-.136.406-.158.447-.268.753-.594 1.095-1.603 1.122-1.907 1.155.906-1.821 1.416-3.6 1.591-4.064.425-1.124 1.671-1.125 1.671-1.125zM13.078 6h6.377v11.33h-2.573l-2.184 1.373-.401-1.373h-1.219zm1.313 1.219v8.86h.623l.263.937 1.455-.938h1.456v-8.86z"/></svg>