Fix database backward migration

Author: GuillaumeGomez

src/db/migrate.rs

@@ -712,7 +712,7 @@ pub fn migrate(version: Option<Version>, conn: &mut Client) -> CratesfyiResult<(
                 UPDATE releases
                     SET github_repo = repositories.host_id
                 FROM repositories
-                WHERE repositories.host_id = releases.github_repo AND releases.repository_id IS NOT NULL AND repositories.host = 'github.com';
+                WHERE releases.repository_id IS NOT NULL AND repositories.host = 'github.com';
 
                 DROP INDEX releases_github_repo_idx;
                 DROP INDEX github_repos_stars_idx;