updating CI workflow file following default branch rename

Author: cmendl

.github/workflows/ci.yml

@@ -1,11 +1,12 @@
-name: Run unittests
+name: CI
+
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   build:

README.rst

@@ -1,4 +1,4 @@
-.. image:: https://github.com/cmendl/pytenet/actions/workflows/ci.yml/badge.svg?branch=master
+.. image:: https://github.com/cmendl/pytenet/actions/workflows/ci.yml/badge.svg
   :target: https://github.com/cmendl/pytenet/actions/workflows/ci.yml
 .. image:: http://joss.theoj.org/papers/10.21105/joss.00948/status.svg
   :target: https://doi.org/10.21105/joss.00948

doc/conf.py

@@ -126,7 +126,7 @@ def linkcode_resolve(domain, info):
     else:
         linestart, linestop = linenum, linenum + len(source) - 1
 
-    return f"https://github.com/cmendl/pytenet/tree/master/{filepath}#L{linestart}-L{linestop}"
+    return f"https://github.com/cmendl/pytenet/tree/main/{filepath}#L{linestart}-L{linestop}"
 
 
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