Bump mini_racer from 0.6.2 to 0.6.3

Bumps [mini_racer](https://github.com/discourse/mini_racer) from 0.6.2 to 0.6.3.
- [Release notes](https://github.com/discourse/mini_racer/releases)
- [Changelog](https://github.com/rubyjs/mini_racer/blob/master/CHANGELOG)
- [Commits](https://github.com/discourse/mini_racer/compare/v0.6.2...v0.6.3)

---
updated-dependencies:
- dependency-name: mini_racer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -43,4 +43,4 @@ gem 'loofah', '>= 2.3.1'
 # gem 'ruby-oembed'
 gem 'terminal-table'
 
-gem "mini_racer", "~> 0.6.2"
+gem "mini_racer", "~> 0.6.3"

Gemfile.lock

@@ -170,7 +170,7 @@ GEM
     mercenary (0.4.0)
     method_source (1.0.0)
     mini_portile2 (2.8.0)
-    mini_racer (0.6.2)
+    mini_racer (0.6.3)
       libv8-node (~> 16.10.0.0)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
@@ -281,7 +281,7 @@ DEPENDENCIES
   listen
   loofah (>= 2.3.1)
   mercenary
-  mini_racer (~> 0.6.2)
+  mini_racer (~> 0.6.3)
   minima
   nokogiri (>= 1.10.4)
   rack (~> 2.2.4)