Fixed HDFFV-10404

Description:
    Applied the typo fixes from user's report.
    The previous pull request couldn't be merged because it was too old,
    and it was too complicated for me to resolve conflicts.
Platform tested:
    Linux/64 (jelly) - very minor

c++/src/H5IdComponent.cpp

@@ -322,7 +322,7 @@ IdComponent::~IdComponent() {}
 
 //
 // Implementation of protected functions for HDF5 Reference Interface
-// and miscelaneous helpers.
+// and miscellaneous helpers.
 //
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS