Bump nokogiri from 1.11.7 to 1.13.9

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.11.7 to 1.13.9.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.11.7...v1.13.9)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
...

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

CNAME

@@ -0,0 +1 @@
+mgrove.uk

Gemfile.lock

@@ -41,7 +41,6 @@ GEM
     faraday-net_http (1.0.1)
     faraday-net_http_persistent (1.1.0)
     ffi (1.15.3)
-    ffi (1.15.3-x64-mingw32)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (215)
@@ -215,17 +214,15 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.5.3)
+    mini_portile2 (2.8.0)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.14.4)
     multipart-post (2.1.1)
-    nokogiri (1.11.7)
-      mini_portile2 (~> 2.5.0)
-      racc (~> 1.4)
-    nokogiri (1.11.7-x64-mingw32)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     octokit (4.21.0)
       faraday (>= 0.9)
@@ -233,7 +230,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -264,9 +261,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
-    unf_ext (0.0.7.7-x64-mingw32)
     unicode-display_width (1.7.0)
-    wdm (0.1.1)
     zeitwerk (2.4.2)
 
 PLATFORMS
@@ -275,7 +270,6 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    2.1.4