[ntuple] fix up RNTupleDescriptorBuilder::SetNTuple() signature

Author: jblomer

tree/ntuple/inc/ROOT/RNTupleDescriptor.hxx

@@ -1763,7 +1763,7 @@ public:
                    std::uint16_t versionPatch);
    void SetVersionForWriting();
 
-   void SetNTuple(const std::string_view name, const std::string_view description);
+   void SetNTuple(std::string_view name, std::string_view description);
    /// Sets the `flag`-th bit of the feature flag to 1.
    /// Note that `flag` itself is not a bitmask, just the bit index of the flag to enable.
    void SetFeature(unsigned int flag);

tree/ntuple/src/RNTupleDescriptor.cxx

@@ -1093,8 +1093,7 @@ void ROOT::Internal::RNTupleDescriptorBuilder::SetVersionForWriting()
    fDescriptor.fVersionPatch = RNTuple::kVersionPatch;
 }
 
-void ROOT::Internal::RNTupleDescriptorBuilder::SetNTuple(const std::string_view name,
-                                                         const std::string_view description)
+void ROOT::Internal::RNTupleDescriptorBuilder::SetNTuple(std::string_view name, std::string_view description)
 {
    fDescriptor.fName = std::string(name);
    fDescriptor.fDescription = std::string(description);