refactor(map): use top-level values: key in map.jinja dumps

* Semi-automated using https://github.com/myii/ssf-formula/pull/284

openssh/_mapdata/_mapdata.jinja

@@ -1,9 +1,9 @@
 # yamllint disable rule:indentation rule:line-length
-# {{ grains.get('osfinger', grains.os) }}
+# {{ grains.get("osfinger", grains.os) }}
 ---
 {#- use salt.slsutil.serialize to avoid encoding errors on some platforms #}
-{{ salt['slsutil.serialize'](
-     'yaml',
+{{ salt["slsutil.serialize"](
+     "yaml",
      map,
      default_flow_style=False,
      allow_unicode=True,