docs: spelling is 'Delta Chat', unless there are technical reasons for something else

chatmaild/src/chatmaild/defaults/appversions.json

@@ -5,9 +5,9 @@
       "sources": [
         {
           "sourceId": "gplay",
-          "versionInteger": 760,
-          "versionString": "2.67.0",
-          "downloadUrl": "https://github.com/deltachat/deltachat-android/releases/download/v2.67.0/deltachat-gplay-release-2.67.0.apk"
+          "versionInteger": 759,
+          "versionString": "2.64.0",
+          "downloadUrl": "https://github.com/deltachat/deltachat-android/releases/download/v2.64.0/deltachat-gplay-release-2.64.0.apk"
         }
       ]
     }

www/src/info.md

@@ -4,7 +4,7 @@
 {{ config.mail_domain }} provides a low-maintenance, resource efficient and 
 interoperable e-mail service for everyone. What's behind a `chatmail` is 
 effectively a normal e-mail address just like any other but optimized 
-for the usage in chats, especially DeltaChat.
+for the usage in chats, especially Delta Chat.
 
 
 ### Rate and storage limits