Update CHANGELOG.md [skip ci]

Author: tcompa

CHANGELOG.md

@@ -6,7 +6,7 @@
     * Use latest version of Zenodo tiny-ome-zarr dataset (\#817).
     * Relax pip-version constraint in external-packages-manifest tests (\#825).
     * Run pip-based CI also regularly and on-demand (\#829).
-    * Update GitHub actionss for upload/download/coverage (\#832).
+    * Update GitHub actions for upload/download/coverage (\#832).
 * Dependencies:
     * Require `stackview<=0.9.0` (\#829).
 * Documentation: