Changeling file not found

I have the changelogfile.sql in the same GitHub repo as the circle config file. I keep getting this error “Caused by: java.io.FileNotFoundException: The file /changelog.sql was not found in the configured search path” .

I am using this command “liquibase --changeLogFile=/changelog.sql --url=jdbc:postgresql://xxxxxxxxxxx.rds.amazonaws.com:5432/ --username=xxxxxx --password=xxxxxxxxx --log-level=debug --searchPath=https://github.com/xxxxxxxx/liquidbase/blob/main/dbchanges update”

I need some help figuring out the path