Update torbrowser-launcher to 0.3.2

Summary:
Changes:

• Switch to keys.openpgp.org when refreshing signing key, because SKS keyservers are broken
• Use new Tor Browser logo

Test Plan:

1. Launch, connect to Tor network.
2. Make a search in the addressbar to test clearnet functionality.
3. Navigate to DuckDuckGo .onion address to test darknet functionality.

Reviewers: Triage Team, JoshStrobl

Reviewed By: Triage Team, JoshStrobl

Subscribers: JoshStrobl

Differential Revision: https://dev.getsol.us/D6819