Added invidious support info to the help page.

help/index_en.html

@@ -27,6 +27,12 @@
 	  Come contribute, make some suggestions and help out in the Discord: <a href="https://discord.gg/QnmVMpU">https://discord.gg/QnmVMpU</a>
     </p>
 
+    <a class="bigText" href="/options/options.html">Enable Invidious Support</a>
+
+    <p>
+      Invidious is a third-party YouTube viewer. SponsorBlock now supports invidious along with YouTube. Please visit the options page to make sure everything is how you want it to be.
+    </p>
+
     <h1>How skipping works</h1>
 
     <p class="projectPreview">

help/styles.css

@@ -1,4 +1,8 @@
-:not(.hljs-keyword):not(.hljs-comment):not(.hljs-number):not(.hljs-string):not(pre):not(code) {
+.bigText {
+  font-size: 50px;
+}
+
+body {
   background-color: #333333;
 }
 
@@ -122,7 +126,7 @@ a {
   text-decoration: none;
 }
 
-p,li {
+p,li,a {
   font-family: sans-serif;
   font-size: 20;
   color: #c4c4c4;