documentation: fix some minor issues in the comments

src/gridcoin/project.h

@@ -188,7 +188,7 @@ class ProjectEntry
     std::optional<bool> HasGDPRControls() const;
 
     //!
-    //! \brief Returns true if project requires an externel adapter for statistics collection.
+    //! \brief Returns true if project requires an external adapter for statistics collection.
     //!
     std::optional<bool> RequiresExtAdapter() const;
 
@@ -616,7 +616,7 @@ class AutoGreylist
         //! v3 superblock history is less than 7, the WAS will be equal to 1.0 unless there are no collected statistics
         //! on two superblocks during that interval, in which case the WAS will be 0.0.
         //!
-        //! \return Fraction of Work Availablity Score.
+        //! \return Fraction of Work Availability Score.
         //!
         Fraction GetWAS()
         {

src/gridcoin/voting/poll.cpp

@@ -231,7 +231,7 @@ Fraction Poll::ResolveMagnitudeWeightFactor(CBlockIndex *index) const
     // Find the current protocol entry value for Magnitude Weight Factor, if it exists.
     ProtocolEntryOption protocol_entry = GetProtocolRegistry().TryLastBeforeTimestamp("magnitudeweightfactor", m_timestamp);
 
-    // If their is an entry prior or equal in timestemp to the start of the poll and it is active then set the magnitude weight
+    // If their is an entry prior or equal in timestamp to the start of the poll and it is active then set the magnitude weight
     // factor to that value. If the last entry is not active (i.e. deleted), then leave at the default.
     if (protocol_entry != nullptr && protocol_entry->m_status == ProtocolEntryStatus::ACTIVE) {
         magnitude_weight_factor = Fraction().FromString(protocol_entry->m_value);