Rename main branch references (#356)

Author: mwtoews

.github/workflows/deploy.yml

@@ -5,7 +5,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
     paths:
       - '.github/workflows/deploy.yml'
   release:

.github/workflows/test.yml

@@ -3,7 +3,7 @@ name: Test
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
   workflow_dispatch:
   schedule:

docs/source/performance.rst

@@ -6,7 +6,7 @@ Performance
 See the `benchmarks.py`_ file for a comparison of various query methods
 and how much acceleration can be obtained from using Rtree.
 
-.. _benchmarks.py: https://github.com/Toblerity/rtree/blob/master/benchmarks/benchmarks.py
+.. _benchmarks.py: https://github.com/Toblerity/rtree/blob/main/benchmarks/benchmarks.py
 
 There are a few simple things that will improve performance.