Bump content/specs from a12fa3b to 347cc50 (#748)

Bumps [content/specs](https://github.com/scientific-python/specs) from `a12fa3b` to `347cc50`.
- [Commits](scientific-python/specs@a12fa3b...347cc50)

---
updated-dependencies:
- dependency-name: content/specs
  dependency-version: 347cc5091dcca3505dd597403a9e24890091b2be
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]