Warn when we fallback to a different version on `helm pull`

Close: https://github.com/helm/helm/issues/31253

Signed-off-by: Benoit Tigeot <benoit.tigeot@lifen.fr>

pkg/repo/v1/index.go

@@ -215,6 +215,7 @@ func (i IndexFile) Get(name, version string) (*ChartVersion, error) {
 		}
 
 		if constraint.Check(test) {
+			slog.Warn("unable to find exact version; falling back to closest available version", "chart", name, "requested", version, "selected", ver.Version)
 			return ver, nil
 		}
 	}