fix: add missing variable in pr preview release action

.github/workflows/pr-preview-release.yml

@@ -61,9 +61,10 @@ jobs:
                   script: |
                       const prNumber = ${{ steps.pr.outputs.number }};
                       const releaseTag = `agentapi_${prNumber}`;
+                      const repoUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}`;
                       github.rest.issues.createComment({
                         issue_number: prNumber,
                         owner: context.repo.owner,
                         repo: context.repo.repo,
                         body: `✅ Preview binaries are ready!\n\nTo test with modules: \`\`\`agentapi: ${prNumber}\`\`\` or download from: ${repoUrl}/releases/tag/${releaseTag}`
-                      });
+                      });