Typo fixes in older notes

Author: nvillahermosa-mdb

source/release-notes.txt

@@ -237,7 +237,7 @@ New features:
 
 - Users can :ref:`migrate time series data <rm-timeseries>` into MongoDB
   with native Time Series support.
-- Users can migrate data from TimescaleDB Hybertables.
+- Users can migrate data from TimescaleDB Hypertables.
 - Users can migrate from a database that has a name
   different from the name used when creating the corresponding project.
 - Migration performance improves by setting write concern to 1 by
@@ -304,7 +304,7 @@ Bug fixes:
 Improvements:
 
 - Improved synthetic foreign keys to be preserved after schema refresh.
-- Fix for fully-offline deployments in airgapped environments. 
+- Fix for fully-offline deployments in air gapped environments. 
 - Fix for certain combinations of mappings, specifically two different
   mappings at the same level of embedding. 
 - Various minor fixes and improvements to Sybase database support, CDC