Clarify brew merge requirements
@@ -31,8 +31,9 @@ all: test checkfmt install
# Bump the version of the vespa-cli formula and create a pull request to Homebrew repository.
#
-# When the homebrew PR has been merged, verify that the prebuilt bottles are
-# available for install by running `brew update && brew install vespa-cli`.
+# Homebrew's automated BrewTestBot must do the merge for the bottles to be published. When
+# the PR has been merged check that the merge was done by their bot, and that installing
+# the new version works by running: `brew update && brew install vespa-cli`.
#
# Example:
#
