Export newUnameCollector function in uname.go (#3227)

Signed-off-by: Vitaly Orlov <orloff.v@gmail.com>

collector/uname.go

@@ -50,11 +50,11 @@ type uname struct {
 }
 
 func init() {
-	registerCollector("uname", defaultEnabled, newUnameCollector)
+	registerCollector("uname", defaultEnabled, NewUnameCollector)
 }
 
 // NewUnameCollector returns new unameCollector.
-func newUnameCollector(logger *slog.Logger) (Collector, error) {
+func NewUnameCollector(logger *slog.Logger) (Collector, error) {
 	return &unameCollector{logger}, nil
 }