Update dependency github-pages to v220 (grafana#231)

Signed-off-by: Renovate Bot <[email protected]>

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

docs/Gemfile

@@ -12,7 +12,7 @@ source "https://rubygems.org"
 gem "minima", "~> 2.5"
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
-gem "github-pages","~> 219", group: :jekyll_plugins
+gem "github-pages","~> 220", group: :jekyll_plugins
 gem "just-the-docs"
 # If you have any plugins, put them here!
 group :jekyll_plugins do

docs/Gemfile.lock

@@ -26,7 +26,7 @@ GEM
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
     execjs (2.8.1)
-    faraday (1.7.1)
+    faraday (1.8.0)
       faraday-em_http (~> 1.0)
       faraday-em_synchrony (~> 1.0)
       faraday-excon (~> 1.1)
@@ -45,11 +45,11 @@ GEM
     faraday-net_http_persistent (1.2.0)
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
-    ffi (1.15.3)
+    ffi (1.15.4)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    github-pages (219)
-      github-pages-health-check (= 1.17.7)
+    github-pages (220)
+      github-pages-health-check (= 1.17.9)
       jekyll (= 3.9.0)
       jekyll-avatar (= 0.7.0)
       jekyll-coffeescript (= 1.1.1)
@@ -92,7 +92,7 @@ GEM
       nokogiri (>= 1.10.4, < 2.0)
       rouge (= 3.26.0)
       terminal-table (~> 1.4)
-    github-pages-health-check (1.17.7)
+    github-pages-health-check (1.17.9)
       addressable (~> 2.3)
       dnsruby (~> 1.60)
       octokit (~> 4.0)
@@ -268,15 +268,15 @@ GEM
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.7)
-    unicode-display_width (1.7.0)
+    unf_ext (0.0.8)
+    unicode-display_width (1.8.0)
     zeitwerk (2.4.2)
 
 PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  github-pages (~> 219)
+  github-pages (~> 220)
   jekyll-feed (~> 0.12)
   just-the-docs
   minima (~> 2.5)