Rename the repository to inbuxa-webmail

The repository moved from inbuxa/ihasmail-inbuxa to inbuxa/inbuxa-webmail,
matching inbuxa-server and inbuxa-admin. Point the source links, the image
name and the package link at the new name. The OAuth client id stays
ihasmail-inbuxa, since that is what the server registers.

docker-compose.yml

@@ -29,7 +29,7 @@ services:
       APP_SECRET: ${APP_SECRET:?set APP_SECRET in .env (openssl rand -base64 48)}
       APP_NAME: ${APP_NAME:-ihasmail}
       BASE_PATH: ${BASE_PATH:-}
-      SOURCE_URL: ${SOURCE_URL:-https://git.coffeylabs.org/inbuxa/ihasmail-inbuxa}
+      SOURCE_URL: ${SOURCE_URL:-https://git.coffeylabs.org/inbuxa/inbuxa-webmail}
       TRUST_PROXY: "1"
       IMAGE_PROXY: "1"
     volumes: