Fastly purge: soften input descriptions and add name labels (#61833)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: heiskr

.github/workflows/purge-fastly.yml

@@ -12,16 +12,16 @@ on:
   workflow_dispatch:
     inputs:
       languages:
-        description: "Comma separated languages, e.g. 'en,es,ja,pt,zh,ru,fr,ko,de'. Blank = all languages."
+        description: "Languages: Comma separated languages, e.g. 'en,es,ja,pt,zh,ru,fr,ko,de'. Blank = all languages."
         required: false
         default: 'en'
       hard:
-        description: 'Evict immediately instead of the default soft purge. Use when a soft purge fails to clear stale content.'
+        description: 'Hard purge: Evict immediately instead of the default soft purge. Use when a soft purge fails to clear stale content.'
         type: boolean
         required: false
         default: false
       everything:
-        description: 'DANGER: hard-purge the ENTIRE Fastly cache... every key, all readers. Ignores the language/hard inputs. To confirm, type exactly: "purge everything". Otherwise leave blank.'
+        description: 'Everything: Hard-purge the entire Fastly cache... every key, all readers. Ignores the languages/hard inputs. To confirm, type exactly: "purge everything". Otherwise leave blank.'
         required: false
         default: ''