fix: Correct branch shown in build logs

prisma/migrations/20220420210057_branch_for_builds/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Build" ADD COLUMN "branch" TEXT;

prisma/schema.prisma

@@ -183,6 +183,7 @@ model Build {
   githubAppId         String?
   gitlabAppId         String?
   commit              String?
+  branch              String?
   status              String?  @default("queued")
   createdAt           DateTime @default(now())
   updatedAt           DateTime @updatedAt