Fix rebase/squash Sentry errors

scripts/release.mjs

@@ -57,10 +57,13 @@ async function build() {
   await $({ stdout: 'inherit', stderr: 'inherit' })`sentry-cli releases new ${nextVersion}`;
 
   console.info('🔗 Associating commits with release');
+  // Pass --ignore-missing when we're not merging into `main` branch. This allows Sentry to
+  // gracefully handle rebasing/squashing.
+  const additionalFlags = process.env.GITHUB_REF === 'refs/heads/main' ? '' : '--ignore-missing';
   await $({
     stdout: 'inherit',
     stderr: 'inherit',
-  })`sentry-cli releases set-commits --auto ${nextVersion}`;
+  })`sentry-cli releases set-commits --auto ${nextVersion} ${additionalFlags}`;
 
   console.info('🧹 Removing sourcemaps from build');
   await $`yarn clean:sourcemaps`;