Fix incorrect spelling

src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc

@@ -1698,7 +1698,7 @@ void rtklib_pvt_gs::log_source_timetag_info(double RX_time_ns, double TAG_time_n
                 }
             catch (const std::exception& e)
                 {
-                    std::cerr << "Problem writting at the log PVT timetag metadata file: " << e.what() << '\n';
+                    std::cerr << "Problem writing at the log PVT timetag metadata file: " << e.what() << '\n';
                 }
         }
 }

src/algorithms/PVT/libs/rinex_printer.h

@@ -98,7 +98,7 @@ public:
      * \brief Print RINEX annotation. If it is the first annotation, it also
      * prints the RINEX headers for navigation and observation files. If it is
      * not the first annotation, it only annotates the observation, and updates
-     * the navigation header if UTC data was not available when writting it for
+     * the navigation header if UTC data was not available when writing it for
      * the first time. The meaning of type_of_rx is as follows:
      *
      * type_of_rx    | Signals