Update BTC RPC Explorer to v3.4.0 (#688)

Co-authored-by: nmfretz <nmfretz@gmail.com>

btc-rpc-explorer/docker-compose.yml

@@ -7,7 +7,7 @@ services:
       APP_PORT: 8080
 
   web:
-    image: getumbrel/btc-rpc-explorer:v3.3.0@sha256:cfd14f8e722cfbf1ad106ba224569c8babe685422461a641abc210e13913c636
+    image: getumbrel/btc-rpc-explorer:v3.4.0@sha256:e85a1fe80919d308b1f80de2dc7174e7b61ec79384d695304fbf259b67b53594
     restart: on-failure
     stop_grace_period: 1m
     environment:

btc-rpc-explorer/umbrel-app.yml

@@ -2,7 +2,7 @@ manifestVersion: 1
 id: btc-rpc-explorer
 category: bitcoin
 name: BTC RPC Explorer
-version: "3.3.0"
+version: "3.4.0"
 tagline: Simple, database-free blockchain explorer
 description: >-
   BTC RPC Explorer is a full-featured, self-hosted explorer for the
@@ -15,8 +15,23 @@ description: >-
 
 
   It's time to appreciate the "fullness" of your node.
+releaseNotes: >-
+  This update brings several changes to BTC RPC Explorer, including:
+
+  - Several new API actions/changes (some breaking)
+
+  - Homepage additions such as a "Next Halving" widget.
+
+  - New curated list of Bitcoin "Holidays"
+
+  - Refreshed "Dark" theme with blues toned down (legacy dark theme still available)
+
+  - and more!
+
+
+  Full release notes are available at https://github.com/janoside/btc-rpc-explorer/releases/tag/v3.4.0
 developer: Dan Janosik
-website: https://explorer.btc21.org
+website: https://bitcoinexplorer.org/
 dependencies:
   - bitcoin
   - electrs
@@ -31,4 +46,4 @@ path: ""
 defaultUsername: ""
 defaultPassword: ""
 submitter: Umbrel
-submission: https://github.com/getumbrel/umbrel/pull/334
+submission: https://github.com/getumbrel/umbrel/pull/334