README.md: Use travis-ci.com domain for badge

These are the second generation of Amazon's ARM-based instances.

See: https://blog.travis-ci.com/2020-09-11-arm-on-aws

.travis.yml

@@ -5,6 +5,8 @@ node_js:
   - 13
   - 14
 script: npm run build
+os: linux
+arch: arm64-graviton2
 dist: focal
 
 # vim: ts=2 sw=2 et

README.md

@@ -1,4 +1,4 @@
-# Hugo Bootstrap v4 Blog [![Build Status](https://travis-ci.org/alanorth/hugo-theme-bootstrap4-blog.svg?branch=master)](https://travis-ci.org/alanorth/hugo-theme-bootstrap4-blog) [![builds.sr.ht status](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog.svg)](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog?)
+# Hugo Bootstrap v4 Blog [![Build Status](https://travis-ci.com/alanorth/hugo-theme-bootstrap4-blog.svg?branch=master)](https://travis-ci.org/alanorth/hugo-theme-bootstrap4-blog) [![builds.sr.ht status](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog.svg)](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog?)
 A simple but opinionated [Hugo](https://gohugo.io) theme geared towards blog-style content. Based on the older two-column [Bootstrap blog example](https://v4-alpha.getbootstrap.com/examples/blog/) that was used for several Bootstrap versions, but has now been retired in favor of a "snarky" (their words) new example as of version [4.0.0's final release](https://blog.getbootstrap.com/2018/01/18/bootstrap-4/).
 
 ![Screenshot](https://raw.githubusercontent.com/alanorth/hugo-theme-bootstrap4-blog/master/screenshot.png "Screenshot")