ci: use the tracked Codecov config

[dajiaohuang]

What type of PR is this?

ci

Check the PR title.

• This PR title matches the format: <type>(optional scope): <description>.
• The description of this PR title is user-oriented and clear enough for others to understand.
• No user-documentation PR is required; this only corrects an existing CI input.

(Optional) Translate the PR title into Chinese.

ci: 使用仓库中现有的 Codecov 配置

(Optional) More detailed description for this PR(en: English/zh: Chinese).

en:

The unit-test job currently passes ./github/.codecov.yml to the Codecov uploader, but that path does not exist. Its log reports that the config is ignored. The tracked configuration is .github/.codedev.yml.

This one-line functional change points the existing upload step at that file. It does not add or change an action, dependency, secret, permission, or job.

Validation:

• reproduced the Config file github/.codecov.yml not found ... Ignoring config diagnostic in current Actions job 95749550042;
• verified ./.github/.codedev.yml is a tracked regular file;
• parsed the workflow and Codecov configuration as YAML;
• git diff --check passes.

zh(optional): 当前上传步骤指向不存在的 ./github/.codecov.yml，导致 Codecov 忽略配置。本 PR 将路径改为仓库中已有的 .github/.codedev.yml。

(Optional) Which issue(s) this PR fixes:

Fixes #1209

(optional) The PR that updates user documentation:

Not required; this is an internal CI correction.