[ruby/rubygems] Fix retry spec to restore default_base_delay for backoff test

The "is enabled by default with 1 second base delay" test relies on
default_base_delay being 1.0, but spec_helper sets it to 0 globally.
Temporarily restore it to 1.0 within the test.

ruby/rubygems@427525d4a6

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

spec/bundler/bundler/retry_spec.rb

@@ -94,6 +94,9 @@
     end
 
     it "is enabled by default with 1 second base delay" do
+      original_base_delay = Bundler::Retry.default_base_delay
+      Bundler::Retry.default_base_delay = 1.0
+
       attempts = 0
       sleep_times = []
 
@@ -114,6 +117,8 @@
       expect(sleep_times[0]).to eq(1.0)
       # Second retry: 1.0 * 2^1 = 2.0
       expect(sleep_times[1]).to eq(2.0)
+    ensure
+      Bundler::Retry.default_base_delay = original_base_delay
     end
 
     it "sleeps with exponential backoff when base_delay is set" do