build(deps): bump git from 1.12.0 to 1.13.0

Bumps [git](https://github.com/ruby-git/ruby-git) from 1.12.0 to 1.13.0.
- [Release notes](https://github.com/ruby-git/ruby-git/releases)
- [Changelog](https://github.com/ruby-git/ruby-git/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ruby-git/ruby-git/compare/v1.12.0...v1.13.0)

---
updated-dependencies:
- dependency-name: git
  dependency-type: direct:production
...

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

Gemfile

@@ -16,7 +16,7 @@ end
 gem 'rouge', '3.27.0'
 
 gem 'front_matter_parser', '1.0.1'
-gem 'git', '1.12.0'
+gem 'git', '1.13.0'
 gem 'html-proofer', '3.19.4'
 gem 'mdl', '0.11.0'
 gem 'octopress-hooks', '2.6.2'

Gemfile.lock

@@ -16,7 +16,7 @@ GEM
     ffi (1.15.5)
     forwardable-extended (2.6.0)
     front_matter_parser (1.0.1)
-    git (1.12.0)
+    git (1.13.0)
       addressable (~> 2.8)
       rchardet (~> 1.8)
     html-proofer (3.19.4)
@@ -88,7 +88,7 @@ GEM
     parallel (1.22.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (5.0.0)
+    public_suffix (5.0.1)
     racc (1.6.1)
     rainbow (3.1.1)
     rake (13.0.6)
@@ -116,7 +116,7 @@ PLATFORMS
 
 DEPENDENCIES
   front_matter_parser (= 1.0.1)
-  git (= 1.12.0)
+  git (= 1.13.0)
   html-proofer (= 3.19.4)
   jekyll (= 4.2.2)
   jekyll-redirect-from