build(go): 🏗️ simplify required nfpm environment variables

.nfpm.yaml

@@ -12,7 +12,7 @@ description: |
 vendor: org.github.joshuar
 homepage: https://github.com/joshuar/go-hass-app
 license: MIT
-arch: ${NFPM_ARCH}
+arch: ${GOARCH}
 # changelog: CHANGELOG.md
 contents:
   - src: dist/go-hass-agent-${GOARCH}
@@ -22,7 +22,7 @@ contents:
     dst: /usr/share/licenses/go-hass-agent/LICENSE
   - src: README.md
     dst: /usr/share/doc/go-hass-agent/README.md
-  - src: internal/agent/ui/assets/logo-pretty.png
+  - src: internal/agent/ui/assets/go-hass-agent.png
     dst: /usr/share/pixmaps/go-hass-agent.png
   - src: assets/go-hass-agent.desktop
     dst: /usr/share/applications/go-hass-agent.desktop