Fix grammar in secrets module documentation (pythonGH-22467)

From `In particularly,` to `In particular,`

Doc/library/secrets.rst

@@ -21,7 +21,7 @@ The :mod:`secrets` module is used for generating cryptographically strong
 random numbers suitable for managing data such as passwords, account
 authentication, security tokens, and related secrets.
 
-In particularly, :mod:`secrets` should be used in preference to the
+In particular, :mod:`secrets` should be used in preference to the
 default pseudo-random number generator in the :mod:`random` module, which
 is designed for modelling and simulation, not security or cryptography.