Improve upgrade instructions

Author: rosa

UPGRADING.md

@@ -1,10 +1,19 @@
 # Upgrading to version 0.7.x
 
-This version removed the new async mode introduced in version 0.4.0 and introduced a new binstub that can be used to start Solid Queue's supervisor. To install it, you can just run
+This version removed the new async mode introduced in version 0.4.0 and introduced a new binstub that can be used to start Solid Queue's supervisor. It includes also a minor migration.
+
+To install both the binstub `bin/jobs` and the migration, you can just run
 ```
 bin/rails generate solid_queue:install
 ```
 
+Or, if you're using a different database for Solid Queue:
+
+```bash
+$ bin/rails generate solid_queue:install --database <the_name_of_your_solid_queue_db>
+```
+
+
 # Upgrading to version 0.6.x
 
 ## New migration in 3 steps

solid_queue.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.license     = "MIT"
 
   spec.post_install_message = <<~MESSAGE
-    Upgrading to Solid Queue 0.4.x? There are some breaking changes about how Solid Queue is started,
+    Upgrading to Solid Queue 0.4.x, 0.5.x, 0.6.x or 0.7.x? There are some breaking changes about how Solid Queue is started,
     configuration and new migrations. Check https://github.com/rails/solid_queue/blob/main/UPGRADING.md
     for upgrade instructions.
   MESSAGE