Rename default branch to main

.github/pull_request_template.md

@@ -15,13 +15,13 @@ If these changes modify code paths involving cryptography, the opening of files
 
 If these changes add or remove files other than client code, the AppArmor profile may need to be updated. Please check as applicable:
 
- - [ ] I have updated the [AppArmor profile](https://github.com/freedomofpress/securedrop-client/blob/master/files/usr.bin.securedrop-client)
+ - [ ] I have updated the [AppArmor profile](https://github.com/freedomofpress/securedrop-client/blob/HEAD/files/usr.bin.securedrop-client)
  - [ ] No update to the AppArmor profile is required for these changes
  - [ ] I don't know and would appreciate guidance
 
 If these changes modify the database schema, you should include a database migration. Please check as applicable:
 
- - [ ] I have written a migration and upgraded a test database based on `master` and confirmed that the migration applies cleanly
- - [ ] I have written a migration but have not upgraded a test database based on `master` and would like the reviewer to do so
+ - [ ] I have written a migration and upgraded a test database based on `main` and confirmed that the migration applies cleanly
+ - [ ] I have written a migration but have not upgraded a test database based on `main` and would like the reviewer to do so
  - [ ] I need help writing a database migration
  - [ ] No database schema changes are needed

README.md

@@ -145,7 +145,7 @@ vi config.json
 securedrop-client
 ```
 
-Or [manually initialize](https://github.com/freedomofpress/securedrop-client/blob/master/files/securedrop-client) the SecureDrop Client database.
+Or [manually initialize](https://github.com/freedomofpress/securedrop-client/blob/HEAD/files/securedrop-client) the SecureDrop Client database.
 
 8. To run a different version of the client, first add a NetVM (`sys-firewall`) to `sd-app` via its Qubes Settings so you can clone the client repository, and then follow these steps: