use jetstream2 in examples

seems to be more stable

Author: mackuba

README.md

@@ -80,7 +80,7 @@ Alternatively, you can connect to a [Jetstream](https://github.com/bluesky-socia
 Jetstream connections are made using a `Skyfall::Jetstream` instance, which has more or less the same API as `Skyfall::Firehose`, so it should be possible to switch between those by just changing the line that creates the client instance:
 
 ```rb
-sky = Skyfall::Jetstream.new('jetstream1.us-east.bsky.network')
+sky = Skyfall::Jetstream.new('jetstream2.us-east.bsky.network')
 
 sky.on_message { |msg| ... }
 sky.on_error { |e| ... }
@@ -113,7 +113,7 @@ Jetstream has a similar mechanism, except the cursor is the event's timestamp in
 ```rb
 cursor = load_cursor
 
-sky = Skyfall::Jetstream.new('jetstream1.us-east.bsky.network', { cursor: cursor })
+sky = Skyfall::Jetstream.new('jetstream2.us-east.bsky.network', { cursor: cursor })
 sky.on_message do |msg|
   save_cursor(msg.seq)
   process_message(msg)
@@ -283,7 +283,7 @@ Jetstream allows you to specify [filters](https://github.com/bluesky-social/jets
 To use these filters, pass the "wantedCollections" and/or "wantedDids" parameters in the options hash when initializing `Skyfall::Jetstream`. You can use the original JavaScript param names, or a more Ruby-like snake_case form:
 
 ```rb
-sky = Skyfall::Jetstream.new('jetstream1.us-east.bsky.network', {
+sky = Skyfall::Jetstream.new('jetstream2.us-east.bsky.network', {
   wanted_collections: 'app.bsky.feed.post',
   wanted_dids: @dids
 })
@@ -292,7 +292,7 @@ sky = Skyfall::Jetstream.new('jetstream1.us-east.bsky.network', {
 For collections, you can also use the symbol codes used in `Operation#type`, e.g. `:bsky_post`:
 
 ```rb
-sky = Skyfall::Jetstream.new('jetstream1.us-east.bsky.network', {
+sky = Skyfall::Jetstream.new('jetstream2.us-east.bsky.network', {
   wanted_collections: [:bsky_post]
 })
 ```

example/jet_monitor_phrases.rb

@@ -18,7 +18,7 @@
 end
 
 # tell Jetstream to send us only post records
-sky = Skyfall::Jetstream.new('jetstream1.us-east.bsky.network', { wanted_collections: [:bsky_post] })
+sky = Skyfall::Jetstream.new('jetstream2.us-east.bsky.network', { wanted_collections: [:bsky_post] })
 
 sky.on_message do |msg|
   # we're only interested in repo commit messages