Replace LGTM badge with GHA/Sonar

Also: add a Matrix chat badge.

[skip ci]

1 files changed, 4 insertions, 1 deletions

diff --git a/README.md b/README.md
index 2deaa28b..e0f4596c 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,10 @@
 [![release](https://img.shields.io/github/release/quotient-im/libQuotient/all.svg)](https://github.com/quotient-im/libQuotient/releases/latest)
 [![](https://img.shields.io/cii/percentage/1023.svg?label=CII%20best%20practices)](https://bestpractices.coreinfrastructure.org/projects/1023/badge)
 ![](https://img.shields.io/github/commit-activity/y/quotient-im/libQuotient.svg)
-[![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/quotient-im/libQuotient.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/quotient-im/libQuotient/context:cpp)
+![CI Status](https://img.shields.io/github/workflow/status/quotient-im/libQuotient/CI)
+![Sonar Tech Debt](https://img.shields.io/sonar/tech_debt/quotient-im_libQuotient?server=https%3A%2F%2Fsonarcloud.io)
+![Sonar Coverage](https://img.shields.io/sonar/coverage/quotient-im_libQuotient?server=https%3A%2F%2Fsonarcloud.io)
+![Matrix](https://img.shields.io/matrix/quotient:matrix.org?logo=matrix)
 
 The Quotient project aims to produce a Qt5-based SDK to develop applications
 for [Matrix](https://matrix.org). libQuotient is a library that enables client