Fix deprecated GoReleaser feature

Author: hlubek

.goreleaser.yml

@@ -13,12 +13,13 @@ builds:
       - arm64
     main: ./cmd/prunner
 archives:
-  - replacements:
-      darwin: Darwin
-      linux: Linux
-      windows: Windows
-      386: i386
-      amd64: x86_64
+  - name_template: >-
+      {{ .ProjectName }}_
+      {{ .Version }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
 dockers:
   - image_templates:
       - ghcr.io/flowpack/{{ .ProjectName }}:{{ .Version }}-amd64