Bump jekyll-sitemap from 1.3.1 to 1.4.0

Bumps [jekyll-sitemap](https://github.com/jekyll/jekyll-sitemap) from 1.3.1 to 1.4.0.
- [Release notes](https://github.com/jekyll/jekyll-sitemap/releases)
- [Changelog](https://github.com/jekyll/jekyll-sitemap/blob/master/History.markdown)
- [Commits](https://github.com/jekyll/jekyll-sitemap/compare/v1.3.1...v1.4.0)

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

Gemfile.lock

@@ -19,8 +19,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     autoprefixer-rails (9.6.1)
       execjs
     babel-source (5.8.35)
@@ -33,7 +33,7 @@ GEM
       sassc-rails (>= 2.0.0)
     builder (3.2.3)
     colorator (1.1.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     crass (1.0.5)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
@@ -44,7 +44,7 @@ GEM
     extras (0.3.0)
       forwardable-extended (~> 2.5)
     fastimage (2.1.5)
-    ffi (1.11.1)
+    ffi (1.12.2)
     font-awesome-sass (5.11.2)
       sassc (>= 1.11)
     forwardable-extended (2.6.0)
@@ -82,7 +82,7 @@ GEM
       sass (~> 3.4)
     jekyll-seo-tag (2.6.1)
       jekyll (>= 3.3, < 5.0)
-    jekyll-sitemap (1.3.1)
+    jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
@@ -91,10 +91,9 @@ GEM
     liquid-tag-parser (1.9.0)
       extras (~> 0.3)
       liquid (>= 3.0, < 5.0)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
+    listen (3.2.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     loofah (2.3.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -107,7 +106,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     popper_js (1.14.5)
-    public_suffix (3.1.1)
+    public_suffix (4.0.3)
     rack (2.2.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -124,10 +123,9 @@ GEM
       thor (>= 0.19.0, < 2.0)
     rake (12.3.3)
     rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.8.0)
-    ruby_dep (1.5.0)
+    rouge (3.16.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)