Fix issues with new Share extension

This commit fixes the following issues with the new Share extension:
- Typo on user-facing label
- Misconfigured Info.plist that caused the build to be rejected by AppStore Connect

This extension was never shipped to users, so no changelog entry is needed.

Changelog-None
Fixes: eeb6547d3e
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>

share extension/ShareViewController.swift

@@ -58,7 +58,7 @@ struct ShareExtensionView: View {
                     ProgressView()
                 case .no_content:
                     Group {
-                        Text("No content availabe to share", comment: "Title indicating that there was no available content to share")
+                        Text("No content available to share", comment: "Title indicating that there was no available content to share")
                             .font(.largeTitle)
                             .multilineTextAlignment(.center)
                             .padding()