Fix "Not Now"

## Issue:
https://discord.com/channels/362322208485277697/646840786662719488/788694493532520458

## Change:
It's either adding the non-capitalized "Not now" to the list, or change the usage to "Not Now".

Chose the latter since the rest of the modal (and other usage) is using the capitalized format.

static/app-strings.json

@@ -418,6 +418,7 @@
   "Unclaimable": "Unclaimable",
   "Claimed": "Claimed",
   "Enter reward code": "Enter reward code",
+  "Redeem a custom reward code for": "Redeem a custom reward code for",
   "Redeem": "Redeem",
   "Code": "Code",
   "Nothing here": "Nothing here",
@@ -900,6 +901,7 @@
   "Community Choice?": "Community Choice?",
   "Download to your Library": "Download to your Library",
   "Leave a Comment": "Leave a Comment",
+  "That was pretty deep. What do you think?": "That was pretty deep. What do you think?",
   "%repost_total% Reposts": "%repost_total% Reposts",
   "File Description": "File Description",
   "View %count% reposts": "View %count% reposts",
@@ -1532,5 +1534,6 @@
   "Repost url": "Repost url",
   "Close sidebar - hide channels you are following": "Close sidebar - hide channels you are following",
   "Expand sidebar - view channels you are following.": "Expand sidebar - view channels you are following.",
+  "You have found the edge of the internet. %repost% or %publish% your stuff here to claim this spot.": "You have found the edge of the internet. %repost% or %publish% your stuff here to claim this spot.",
   "--end--": "--end--"
 }

ui/modal/modalAutoUpdateDownloaded/view.jsx

@@ -35,7 +35,7 @@ class ModalAutoUpdateDownloaded extends React.PureComponent<Props, State> {
         contentLabel={__('Upgrade Downloaded')}
         title={__('LBRY leveled up')}
         confirmButtonLabel={__('Upgrade Now')}
-        abortButtonLabel={__('Not now')}
+        abortButtonLabel={__('Not Now')}
         confirmButtonDisabled={this.state.disabled}
         onConfirmed={() => {
           this.setState({ disabled: true });