Recommend taiki-e/install-action

See #309

README.md

@@ -70,6 +70,8 @@ $ binstall \
     functionally a replacement for `curl ... | bash` or `wget`-ing the same files, so, things can be improved but it's also fairly moot
 - What do the error codes mean?
   - You can find a full description of errors including exit codes here: <https://docs.rs/cargo-binstall/latest/cargo_binstall/errors/enum.BinstallError.html>
+- Can I use it in CI?
+  - Yes! For GitHub Actions, we recommend the excellent [taiki-e/install-action](https://github.com/marketplace/actions/install-development-tools), which has explicit support for selected tools and uses `cargo-binstall` for everything else.
 
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