fix release breakage since 3b46ed2

Bump github.com/mattn/go-runewidth from 0.0.20 to 0.0.21

Bumps [github.com/mattn/go-runewidth](https://github.com/mattn/go-runewidth) from 0.0.20 to 0.0.21.
- [Commits](mattn/go-runewidth@v0.0.20...v0.0.21)

---
updated-dependencies:
- dependency-name: github.com/mattn/go-runewidth
  dependency-version: 0.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

add interactive demo

bump to Go 1.26.0

fix accidental prompt change in eb45681

fix broken avatars in portable actors

format post titles more efficiently

preallocate memory instead of reading and parsing JSON responses in c…

…hunks

if unused, convert string to []byte without allocating and copying

if unused, convert []byte to string without allocating and copying