Revert “rubyPackages: update, pin rails” and “rubyPackages: update”

This is only a transient commit: it will be fixed just next.

```
 $ git checkout 109b9812728b3b25888771a038149f3a229cfe3d^ -- \
    pkgs/top-level/ruby-packages.nix pkgs/development/ruby-modules/with-packages/Gemfile
```

pkgs/development/ruby-modules/with-packages/Gemfile

@@ -9,7 +9,7 @@ gem 'bacon'
 gem 'byebug'
 gem 'cairo'
 gem 'cairo-gobject'
-gem 'camping', '~> 3'
+gem 'camping'
 # gem 'capybara-webkit' takes too long to build right now since webkit depends on ruby
 gem 'charlock_holmes'
 gem 'cf-uaac'
@@ -115,7 +115,7 @@ gem 'pry-doc'
 gem 'public_suffix'
 gem 'puma'
 gem 'pwntools'
-gem 'rails', '~> 8'
+gem 'rails'
 gem 'rainbow'
 # gem 'rbczmq' deprecated
 gem 'rbnacl'
@@ -135,7 +135,7 @@ gem 'ruby-lxc'
 gem 'ruby-progressbar'
 gem 'ruby-terminfo'
 gem 'ruby-vips'
-gem 'rubyzip', '~>3'
+gem 'rubyzip'
 gem 'rugged'
 gem 'sassc'
 gem 'scrypt'
@@ -143,11 +143,11 @@ gem 'seccomp-tools'
 gem 'semian'
 gem 'sequel'
 gem 'sequel_pg'
+gem 'solargraph'
 gem 'simplecov'
 gem 'sinatra'
 gem 'slop'
 gem 'snappy'
-gem 'solargraph'
 gem 'snmp'
 gem 'sqlite3'
 gem 'standard'