Fix data_category for sessions envelope items

[sl0thentr0py]

noticed this while testing potel

[codecov]

❌ 4 Tests Failed:

Tests completed	Failed	Passed	Skipped
11522	4	11518	1635

View the top 3 failed tests by shortest run time

tests.integrations.aws_lambda.test_aws test_init_error[python3.10]

Stack Traces | 10.6s run time

.../integrations/aws_lambda/test_aws.py:334: in test_init_error
    (event,) = envelope_items
E   ValueError: not enough values to unpack (expected 1, got 0)

tests.integrations.aws_lambda.test_aws test_init_error[python3.11]

Stack Traces | 10.7s run time

.../integrations/aws_lambda/test_aws.py:334: in test_init_error
    (event,) = envelope_items
E   ValueError: not enough values to unpack (expected 1, got 0)

tests.integrations.aws_lambda.test_aws test_init_error[python3.9]

Stack Traces | 10.8s run time

.../integrations/aws_lambda/test_aws.py:334: in test_init_error
    (event,) = envelope_items
E   ValueError: not enough values to unpack (expected 1, got 0)

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