fix(ci): fix build step output path conflict

go build ./cmd/... tried to write a binary named "cmd" which conflicts
with the source directory of the same name; pass -o /dev/null so the
build step only verifies compilation without writing output.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -37,4 +37,4 @@ jobs:
         run: go test ./...
 
       - name: build
-        run: go build ./cmd/...
+        run: go build -o /dev/null ./cmd/...

CHANGELOG.md

@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 Format: [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [0.4.1] - 2026-07-07
+
+### Fixed
+
+- **CI build step** — `go build ./cmd/...` failed with "output already exists and is a directory" because Go tried to write a binary named `cmd`, conflicting with the source directory; fixed by passing `-o /dev/null`
+
 ## [0.4.0] - 2026-07-07
 
 ### Added

README.md

@@ -1,6 +1,6 @@
 # releaser
 
-![release](https://img.shields.io/badge/release-v0.4.0-blue.svg)
+![release](https://img.shields.io/badge/release-v0.4.1-blue.svg)
 
 A CI-friendly release automation tool for GitFlow workflows using Conventional Commits.