CompatHelper: add new compat entry for Downloads at version 1, (keep existing compat) (#1300)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>

Author: github-actions[bot]

Project.toml

@@ -34,6 +34,7 @@ ghr_jll = "07c12ed4-43bc-5495-8a2a-d5838ef8d533"
 [compat]
 ArgParse = "1.1"
 BinaryBuilderBase = "1.20"
+Downloads = "1"
 GitHub = "5.1"
 HTTP = "0.8, 0.9, 1"
 JLD2 = "0.1.6, 0.2, 0.3, 0.4"