fix(deps): update dependency mobx to v6.8.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mobx (source)	6.7.0 -> 6.8.0

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.

[github-actions]

📦 Next.js Bundle Analysis

This analysis was generated by the next.js bundle analysis action 🤖

⚠️ Global Bundle Size Increased

Page	Size (compressed)
global	176.79 KB (🟡 +113 B)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!

Thirteen Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load	% of Budget (350 KB)
/	46.67 KB	223.47 KB	63.85% (+/- <0.01%)
/[page]	45.79 KB	222.58 KB	63.59% (🟡 +0.01%)
/categories/[slug]	8.37 KB	185.17 KB	52.91% (+/- <0.01%)
/favorite/bangumi	7.89 KB	184.68 KB	52.77% (+/- <0.01%)
/favorite/music	4.86 KB	181.65 KB	51.90% (+/- <0.01%)
/friends	54.83 KB	231.63 KB	66.18% (+/- <0.01%)
/notes/[id]	72.32 KB	249.12 KB	71.18% (+/- <0.01%)
/notes/topics	4.94 KB	181.74 KB	51.92% (🟡 +0.01%)
/posts	28 KB	204.79 KB	58.51% (+/- <0.01%)
/posts/[category]/[slug]	64.26 KB	241.06 KB	68.87% (+/- <0.01%)
/projects/[id]	43.59 KB	220.38 KB	62.97% (+/- <0.01%)
/recently	96.51 KB	273.31 KB	78.09% (+/- <0.01%)
/says	13.71 KB	190.51 KB	54.43% (+/- <0.01%)

Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

The "Budget %" column shows what percentage of your performance budget the First Load total takes up. For example, if your budget was 100kb, and a given page's first load size was 10kb, it would be 10% of your budget. You can also see how much this has increased or decreased compared to the base branch of your PR. If this percentage has increased by 20% or more, there will be a red status indicator applied, indicating that special attention should be given to this. If you see "+/- <0.01%" it means that there was a change in bundle size, but it is a trivial enough amount that it can be ignored.