Fix spelling mistakes

[codecov[bot]]

Codecov Report

Merging #129 (4a3c284) into master (cd428de) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #129   +/-   ##
=======================================
  Coverage   92.48%   92.48%           
=======================================
  Files          45       45           
  Lines        1225     1225           
=======================================
  Hits         1133     1133           
  Misses         92       92           

Impacted Files	Coverage Δ
src/tickit/adapters/composed.py	60.00% <ø> (ø)
src/tickit/adapters/epicsadapter/adapter.py	87.75% <ø> (ø)
src/tickit/adapters/epicsadapter/ioc_manager.py	50.00% <ø> (ø)
src/tickit/adapters/httpadapter.py	51.42% <ø> (ø)
...apters/interpreters/command/command_interpreter.py	96.77% <ø> (ø)
...kit/adapters/interpreters/command/regex_command.py	100.00% <ø> (ø)
...t/adapters/interpreters/endpoints/http_endpoint.py	100.00% <ø> (ø)
...pters/interpreters/wrappers/joining_interpreter.py	100.00% <ø> (ø)
src/tickit/core/adapter.py	85.71% <ø> (ø)
src/tickit/core/components/system_simulation.py	97.77% <ø> (ø)
... and 13 more

[garryod]

Ooof, my spelling is bad