Merge pull request #1061 from LeastAuthority/3713.readme-service-fixes

Fix a couple code quality service badges (TravisCI, GitHub Actions) in the README

Fixes: ticket:3713

README.rst

@@ -6,7 +6,7 @@ Free and Open decentralized data store
 
 `Tahoe-LAFS <https://www.tahoe-lafs.org>`__ (Tahoe Least-Authority File Store) is the first free software / open-source storage technology that distributes your data across multiple servers. Even if some servers fail or are taken over by an attacker, the entire file store continues to function correctly, preserving your privacy and security.
 
-|Contributor Covenant|  |readthedocs|  |travis|  |circleci|  |coveralls|
+|Contributor Covenant|  |readthedocs|  |circleci|  |githubactions|  |coveralls|
 
 
 Table of contents
@@ -118,13 +118,12 @@ See `TGPPL.PDF <https://tahoe-lafs.org/~zooko/tgppl.pdf>`__ for why the TGPPL ex
     :alt: documentation status
     :target: http://tahoe-lafs.readthedocs.io/en/latest/?badge=latest
 
-.. |travis| image:: https://travis-ci.org/tahoe-lafs/tahoe-lafs.png?branch=master
-    :alt: build status
-    :target: https://travis-ci.org/tahoe-lafs/tahoe-lafs
-
 .. |circleci| image:: https://circleci.com/gh/tahoe-lafs/tahoe-lafs.svg?style=svg
     :target: https://circleci.com/gh/tahoe-lafs/tahoe-lafs
 
+.. |githubactions| image:: https://github.com/tahoe-lafs/tahoe-lafs/actions/workflows/ci.yml/badge.svg
+    :target: https://github.com/tahoe-lafs/tahoe-lafs/actions
+
 .. |coveralls| image:: https://coveralls.io/repos/github/tahoe-lafs/tahoe-lafs/badge.svg
     :alt: code coverage
     :target: https://coveralls.io/github/tahoe-lafs/tahoe-lafs