Themes: Make color09 different from bg (#985)

* brblack and bg shouldn't be the same

* base1 has better contrast than black

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Co-authored-by: Jeremy Wootten <jeremywootten@gmail.com>

Author: wpkelso

data/io.elementary.terminal.gschema.xml

@@ -142,7 +142,7 @@
       <description>The shape of the cursor of the terminal.</description>
     </key>
     <key name="palette" type="s">
-      <default>"#073642:#dc322f:#859900:#b58900:#268bd2:#d33682:#2aa198:#eee8d5:#002b36:#dc322f:#586e75:#657b83:#839496:#6c71c4:#93a1a1:#fdf6e3"</default>
+      <default>"#073642:#dc322f:#859900:#b58900:#268bd2:#d33682:#2aa198:#eee8d5:#93a1a1:#dc322f:#586e75:#657b83:#839496:#6c71c4:#93a1a1:#fdf6e3"</default>
       <summary>Palette of the terminal.</summary>
       <description>Defines the colors of various things in the terminal.</description>
     </key>