Release prep for 3.9.0

- Bump version 3.8.1 -> 3.9.0
- Update CHANGELOG with circuit breaker / adaptive timeout (P4DEVOPS-9438)
- Update Gemfile.lock

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## [3.9.0](https://github.com/puppetlabs/vmpooler/tree/3.9.0) (2026-03-17)
+
+[Full Changelog](https://github.com/puppetlabs/vmpooler/compare/3.8.1...3.9.0)
+
+**Implemented enhancements:**
+
+- \(P4DEVOPS-9438\) Add circuit breaker and adaptive timeout for provider resilience [\#691](https://github.com/puppetlabs/vmpooler/pull/691) ([smahima27](https://github.com/smahima27))
+
 ## [3.8.1](https://github.com/puppetlabs/vmpooler/tree/3.8.1) (2026-01-14)
 
 [Full Changelog](https://github.com/puppetlabs/vmpooler/compare/3.7.0...3.8.1)

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    vmpooler (3.8.1)
+    vmpooler (3.9.0)
       concurrent-ruby (~> 1.1)
       connection_pool (~> 2.4)
       deep_merge (~> 1.2)

lib/vmpooler/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Vmpooler
-  VERSION = '3.8.1'
+  VERSION = '3.9.0'
 end