rename master to main in release.yml

Author: james-willis

.github/workflows/release.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   build-jar:
-    uses: wherobots/jpostal/.github/workflows/build-and-test.yml@master
+    uses: wherobots/jpostal/.github/workflows/build-and-test.yml@main
   publish:
     needs: build-jar
     runs-on: ubuntu-latest