style(server): gofmt the doc comment (IDEA-2756)

gofmt wants blank lines between list items once one item spans multiple
paragraphs, which the BUG-2792 note made true.

My error, and worth naming exactly: I ran build, vet and the targeted
tests on this commit but not lint, because lint had passed on the
PREVIOUS commit and the change was 'only a comment'. The gate has to run
on the tree being pushed, not on an earlier one that resembles it. CI's
golangci-lint is pinned to the same v2.11.4 the Makefile installs, so
there was no version skew to blame — the local gate would have caught
this in 51 seconds.

internal/server/handlers_workspaces.go

@@ -463,8 +463,10 @@ func (s *Server) handleCreateWorkspace(w http.ResponseWriter, r *http.Request) {
 //
 //   - The calling token isn't an OAuth grant (PAT, CLI session token —
 //     they don't carry a request_id).
+//
 //   - The grant's connection row doesn't exist (pre-Phase-C tokens
 //     fall here until backfill).
+//
 //   - The flag is off (user explicitly scoped out creation power at
 //     consent time or via the connections-page mutation UI). Since
 //     IDEA-2756 handleCreateWorkspace refuses a flag-off connection