Fix branch name (#121)

* Makefile and CI upgrades

* Fix branch name

Author: davidzajac1

.github/workflows/run-db-tests.yml

@@ -60,7 +60,7 @@ jobs:
 
   test-other-dbs:
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' && github.repository == 're-data/dbt-re-data' && github.ref == 'refs/heads/master'
+    if: github.event_name == 'push' && github.repository == 're-data/dbt-re-data' && github.ref == 'refs/heads/main'
     strategy:
       fail-fast: false
       matrix:
@@ -110,7 +110,7 @@ jobs:
 
   clean-up-schemas:
     runs-on: ubuntu-latest
-    if: github.event_name == 'delete' && github.repository == 're-data/dbt-re-data' && github.ref == 'refs/heads/master'
+    if: github.event_name == 'delete' && github.repository == 're-data/dbt-re-data' && github.ref == 'refs/heads/main'
     strategy:
       fail-fast: false
       matrix: