Bump net-imap from 0.5.6 to 0.5.7 in /benchmarks/lobsters

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.5.6 to 0.5.7.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.5.6...v0.5.7)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-version: 0.5.7
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

benchmarks/lobsters/Gemfile

@@ -61,7 +61,7 @@ gem 'rack-attack' # rate-limiting
 
 # Avoid using v0.5.7 ~ v0.5.10 that have bad use of Ractor.make_sharable.
 # TODO: Use v0.5.11+ once it's released with https://github.com/ruby/net-imap/pull/525.
-gem "net-imap", "< 0.5.7"
+gem "net-imap", "< 0.5.8"
 
 group :test, :development do
   gem 'capybara'

benchmarks/lobsters/Gemfile.lock

@@ -153,7 +153,7 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
     minitest (5.25.5)
-    net-imap (0.5.6)
+    net-imap (0.5.7)
       date
       net-protocol
     net-pop (0.1.2)
@@ -347,7 +347,7 @@ DEPENDENCIES
   json
   mail
   memory_profiler
-  net-imap (< 0.5.7)
+  net-imap (< 0.5.8)
   nokogiri (>= 1.13.9)
   oauth
   ostruct