fix: use scoped package name in bug-batch changeset

Unblocks the Release workflow — changesets requires @stainless-code/codemap,
not bare codemap.

Author: SutuSebastian

.changeset/fix-high-bugs-batch.md

@@ -1,5 +1,5 @@
 ---
-"codemap": patch
+"@stainless-code/codemap": patch
 ---
 
 Fix high-severity bugs (describe.each parent stack, git porcelain -z paths, CLI symlink entry, pr-comment TTY stdin), medium bugs (changed-since -z paths, perf baseline RUNS guard, qualified typeof, decorator args_text, for-of binding refs, HTTP body drain, benchmark regex validation, jsx INSERT RETURNING id, sqlite stmt cache on close), and low bugs (CLI parse guards, incremental delete transaction, apply summary.files, extension case, pnpm # paths, coverage db.transaction, impact walk delimiter, worker errors, pointer dedup, benchmark readAll visibility).