Make the status badge work

.github/workflows/tests.yml

@@ -1,4 +1,5 @@
-name: Tests
+# NB: this name is used in the status badge
+name: build
 
 on:
   push:

README.rst

@@ -29,7 +29,7 @@ Licence: GPL v2 or later (https://www.gnu.org/copyleft/gpl.html)
 
 |buildstatus|_ |appveyor|_ |coverage|_
 
-.. |buildstatus| image:: https://github.com/mgedmin/findimports/workflows/tests/badge.svg
+.. |buildstatus| image:: https://github.com/mgedmin/findimports/workflows/build/badge.svg
 .. _buildstatus: https://github.com/mgedmin/findimports/actions?query=workflow%3Atests
 
 .. |appveyor| image:: https://ci.appveyor.com/api/projects/status/github/mgedmin/findimports?branch=master&svg=true