Update critical file(s) according to Chirpy v6.1.0

.github/workflows/pages-deploy.yml

@@ -68,4 +68,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v2

Gemfile

@@ -2,7 +2,7 @@
 
 source "https://rubygems.org"
 
-gem "jekyll-theme-chirpy", "~> 6.0", ">= 6.0.1"
+gem "jekyll-theme-chirpy", "~> 6.1"
 
 group :test do
   gem "html-proofer", "~> 3.18"

_config.yml

@@ -54,10 +54,6 @@ google_site_verification: # fill in to your verification string
 
 google_analytics:
   id: # fill in your Google Analytics ID
-  # Google Analytics pageviews report settings
-  pv:
-    proxy_endpoint: # fill in the Google Analytics superProxy endpoint of Google App Engine
-    cache_path: # the local PV cache data, friendly to visitors from GFW region
 
 # Prefer color scheme setting.
 #