Fix additional misspellings found by codespell

Remaining hits seem to be hex data, certificates,
and other miscellaneous exceptions.
List generated by running codespell -w -L
keypair,Keypair,KeyPair,keyPair,ciph,nd

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/tests/scripts/generate_psa_tests.py b/tests/scripts/generate_psa_tests.py
index 3c76b0a..a705bab 100755
--- a/tests/scripts/generate_psa_tests.py
+++ b/tests/scripts/generate_psa_tests.py
@@ -923,7 +923,7 @@
         filename = self.filename_for(basename)
         test_case.write_data_file(filename, test_cases)
 
-    # Note that targets whose name containns 'test_format' have their content
+    # Note that targets whose name contains 'test_format' have their content
     # validated by `abi_check.py`.
     TARGETS = {
         'test_suite_psa_crypto_generate_key.generated':