fix(releases): correct the v2.2.0 spice-rs link and the v2.1.4 post date

[lukekim]

Two corrections to August release posts. Both are reproducible against public endpoints.

1. The v2.2.0 post links a spice-rs release that does not exist

The SDK Updates section links spice-rs v3.2.0. That tag was never published, so the link is a dead end for every reader who follows it:

$ curl -s -o /dev/null -w '%{http_code}\n' -L https://github.com/spiceai/spice-rs/releases/tag/v3.2.0
404

$ gh api repos/spiceai/spice-rs/tags --jq '.[].name' | head -4
v4.0.0
v3.1.0
v3.0.0
v2.0.0

$ gh api repos/spiceai/spice-rs/releases/latest --jq '.tag_name, .published_at'
v4.0.0
2026-08-25T...

v4.0.0 is the release that shipped with v2.2.0, and it carries exactly the features the post already lists — search, NSQL, async queries, query cancellation, and mTLS. The fix is the version number and the URL; the description is unchanged.

2. The v2.1.4 post contradicts itself on its date

The frontmatter says date: 2026-08-06. The title on the same post says Aug 5, 2026, and the v2.1.4 release was published on Aug 5:

$ gh api repos/spiceai/spiceai/releases/tags/v2.1.4 --jq '.published_at'
2026-08-05T19:15:42Z

Two independent signals say Aug 5 and one says Aug 6, so this changes the frontmatter to 2026-08-05. The frontmatter is what renders as the post date, so today the site shows a date that the post's own heading disagrees with.

The neighbouring posts are all self-consistent — v2.1.3 (2026-08-04 / "Aug 4"), v2.1.5 (2026-08-12 / "Aug 12") — which is why this one stands out.

If Aug 6 is deliberate and the title is what is wrong, say so and I will flip the change to the title instead.

[github-actions]

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[github-actions]

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