fix(cli): checkout i18n branch from remote instead of HEAD (#2049)

* fix(cli): checkout i18n branch from remote instead of HEAD

* fix(cli): add changeset

Author: AndreyHirsa

.changeset/heavy-areas-happen.md

@@ -0,0 +1,5 @@
+---
+"lingo.dev": patch
+---
+
+Fixed a bug where the CI pull request flow would ignore the existing translation branch and start from scratch, which could produce duplicate PRs when the original was merged during a concurrent run.

packages/cli/src/cli/cmd/ci/flows/pull-request.ts

@@ -99,7 +99,7 @@ export class PullRequestFlow extends InBranchFlow {
 
   private checkoutI18nBranch(i18nBranchName: string) {
     execSync(`git fetch origin ${i18nBranchName}`, { stdio: "inherit" });
-    execSync(`git checkout -b ${i18nBranchName}`, {
+    execSync(`git checkout -b ${i18nBranchName} origin/${i18nBranchName}`, {
       stdio: "inherit",
     });
   }