chore(ci): fix release flow (#742)

Also reverts the pseudo-release that was 0.21.1 as it didn't fully work)

Author: vladfrangu

.github/workflows/release.yaml

@@ -146,7 +146,7 @@ jobs:
         steps:
             - uses: actions/checkout@v4
               with:
-                  ref: ${{ needs.update_changelog.changelog_commitish }}
+                  ref: ${{ needs.update_changelog.outputs.changelog_commitish }}
 
             - name: Use Node.js 22
               uses: actions/setup-node@v4

CHANGELOG.md

@@ -2,12 +2,16 @@
 
 All notable changes to this project will be documented in this file.
 
-## [0.21.1](https://github.com/apify/apify-cli/releases/tag/v0.21.1) (2025-02-05)
+<!-- git-cliff-unreleased-start -->
+
+## 0.21.1 - **not yet released**
 
 ### 🐛 Bug Fixes
 
 - Emit logs to stderr when actors are started with `--json` flag ([#741](https://github.com/apify/apify-cli/pull/741)) ([a50b80e](https://github.com/apify/apify-cli/commit/a50b80e1e8f636b6878de8f8c30032c14daf8105)) by [@vladfrangu](https://github.com/vladfrangu), closes [#740](https://github.com/apify/apify-cli/issues/740)
 
+<!-- git-cliff-unreleased-end -->
+
 ## [0.21.0](https://github.com/apify/apify-cli/releases/tag/v0.21.0) (2025-01-16)
 
 ### 🚀 Features