fix: directory as filename

[thomasrockhu-codecov]

fixes #439

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: codecov_cli/services/upload/file_finder.py

Function	Unhandled Issue
find_files	TypeError: can only concatenate list (not "tuple") to list codecov_cli.services.upload.file_finder in ... Event Count: 6

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[github-actions]

✅ All tests successful. No failed tests were found.

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[codecov]

❌ 5 Tests Failed:

Tests completed	Failed	Passed	Skipped
3560	5	3555	0

View the top 3 failed tests by shortest run time

api.temp.calculator.test_calculator::test_divide

Stack Traces | 0.001s run time

def
                test_divide():
                > assert Calculator.divide(1, 2) == 0.5
                E assert 1.0 == 0.5
                E + where 1.0 = <function Calculator.divide at 0x104c9eb90>(1, 2)
                E + where <function Calculator.divide at 0x104c9eb90> = Calculator.divide
                .../temp/calculator/test_calculator.py:30: AssertionError

api.temp.calculator.test_calculator::test_divide

Stack Traces | 0.001s run time

def
                test_divide():
                > assert Calculator.divide(1, 2) == 0.5
                E assert 1.0 == 0.5
                E + where 1.0 = <function Calculator.divide at 0x104c9eb90>(1, 2)
                E + where <function Calculator.divide at 0x104c9eb90> = Calculator.divide
                .../temp/calculator/test_calculator.py:30: AssertionError

api.temp.calculator.test_calculator::test_divide

Stack Traces | 0.001s run time

def
                test_divide():
                > assert Calculator.divide(1, 2) == 0.5
                E assert 1.0 == 0.5
                E + where 1.0 = <function Calculator.divide at 0x104c9eb90>(1, 2)
                E + where <function Calculator.divide at 0x104c9eb90> = Calculator.divide
                .../temp/calculator/test_calculator.py:30: AssertionError

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