Upgrade to v1.7.7 (Riot -> Element)

riot/welcome.html

@@ -118,7 +118,7 @@ h1::after {
 }
 
 .mx_ButtonCreateAccount {
-    background-color: #03B381;
+    background-color: #0DBD8B;
     color: white !important;
 }
 
@@ -172,7 +172,7 @@ we don't have an account and should hide them. No account == no guest account ei
     <a href="https://riot.im" target="_blank" rel="noopener">
         <img src="welcome/images/logo.svg" alt="" class="mx_Logo"/>
     </a>
-    <h1 class="mx_Header_title">_t("Welcome to Riot.im")</h1>
+    <h1 class="mx_Header_title">_t("Welcome to Element")</h1>
     <h4 class="mx_Header_subtitle">_t("Decentralised, encrypted chat &amp; collaboration powered by [matrix]")</h4>
     <div class="mx_ButtonGroup">
         <div class="mx_ButtonRow">