_config.yml: Bump remote_theme to v0.7.0

Should be a straightforward change; none of the necessary migrations affect Just the Class.

Author: mattxwang

_config.yml

@@ -22,7 +22,7 @@ url: 'https://kevinl.info' # the base hostname & protocol for your site, e.g. ht
 exclude: ["Gemfile", "Gemfile.lock", "LICENSE"]
 
 # Theme settings
-remote_theme: just-the-docs/just-the-docs@v0.6.2
+remote_theme: just-the-docs/just-the-docs@v0.7.0
 color_scheme: light
 search_enabled: true
 heading_anchors: true