Update/misc frontend (#2191)

* update version to 0.3.4

* update release  guide with sdk instructions

* remove comment

* update page styling

* closes #2152, closes #2155, closes #2157

* move marketing site link to description block

* re-arrange setup wizard recovery options

* move divider for update list item

* fix bug in mocks to display lnd as aavailable for update

---------

Co-authored-by: Matt Hill <matthewonthemoon@gmail.com>

build/RELEASE.md

@@ -70,3 +70,7 @@
   - `make eos_raspberrypi.img`
   - `tar --format=posix -cS -f- eos-<version>-<git hash>-<date>_raspberrypi.img | gzip > eos-<version>-<git hash>-<date>_raspberrypi.tar.gz`
 - Artifact `./eos-<version>-<git hash>-<date>_raspberrypi.tar.gz`
+
+## `embassy-sdk`
+
+- Build and deploy to all registries