fix: use go run to create the completion files

Author: marceljk

.goreleaser.yaml

@@ -49,9 +49,9 @@ builds:
           output: true
         # Completion files
         - cmd: mkdir -p dist/completions
-        - cmd: sh -c './dist/macos-builds_{{.Target}}/{{.Name}} completion zsh > ./dist/completions/stackit.zsh'
-        - cmd: sh -c './dist/macos-builds_{{.Target}}/{{.Name}} completion bash > ./dist/completions/stackit.bash'
-        - cmd: sh -c './dist/macos-builds_{{.Target}}/{{.Name}} completion fish > ./dist/completions/stackit.fish'
+        - cmd: sh -c 'go run main.go completion zsh > ./dist/completions/stackit.zsh'
+        - cmd: sh -c 'go run main.go completion bash > ./dist/completions/stackit.bash'
+        - cmd: sh -c 'go run main.go completion fish > ./dist/completions/stackit.fish'
 
 archives:
   - id: windows-archives