ci: fix run-name to say "channel" instead of a bare branch name

run-name showed "release version nightly" / "release version pre-release"
for every branch-push run — read exactly like the release TAG was bare
"nightly"/"pre-release" (the bug fixed earlier), when the actual GH Release
tag has been correctly versioned (e.g. "0.4.3-nightly") all along via
resolve-channel. run-name can't reference job outputs (it's evaluated before
any job runs), so it can't show the real computed tag directly — spell out
"channel" instead so the label can't be mistaken for the release tag again.

.github/workflows/release.yml

@@ -1,6 +1,14 @@
 name: CI/CD
 
-run-name: "CI/CD: release version ${{ github.ref_name }}"
+
+# `run-name` is evaluated at workflow-start, BEFORE any job runs — it cannot
+# see resolve-channel's computed tag_name (e.g. "0.4.3-nightly"), only the
+# `github.*` context. The old "release version ${{ github.ref_name }}" showed
+# the bare branch name ("nightly"/"pre-release") for every run, which reads
+# exactly like a literal release tag and caused real confusion — the actual
+# release tag has been correct (versioned) all along; only this label lied
+# about it. Spell out "channel" so nobody mistakes one for the other again.
+run-name: ${{ startsWith(github.ref, 'refs/tags/') && format('Release build: {0}', github.ref_name) || format('Release build: {0} channel', github.ref_name) }}
 
 on:
   push: