chore: Update minimum version to 25.10 and drop minimum support for 25.04

Author: adamrtalbot

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         java_version: [17, 21]
-        nextflow_version: ["25.04", "25.10"]
+        nextflow_version: ["25.10", "26.04"]
 
     steps:
       - name: Environment

docs/CONTRIBUTING.md

@@ -8,7 +8,7 @@ Thank you for your interest in contributing to nf-slack! This document provides
 
 - Java 11 or higher
 - Gradle (wrapper included)
-- Nextflow 25.04.0 or higher
+- Nextflow 25.10.0 or higher
 - A Slack workspace with admin access for testing
 
 ### Development Setup

docs/getting-started/setup.md

@@ -4,7 +4,7 @@ Get Slack notifications working with your Nextflow pipeline in minutes.
 
 ## Prerequisites
 
-- Nextflow v25.04.0 or later
+- Nextflow v25.10.0 or later
 - A Slack workspace where you have permission to add apps
 
 ## 1. Create a Slack App