fix: bundling multiple files specified as CLI arguments

[tatomyr]

What/Why/How?

Fixed a bug where bundling multiple API description files specified as CLI arguments, along with the --output option, stored the result in a single file instead of a folder.

Reference

Fixes #1715

The original bug was introduced in #1708

Testing

Screenshots (optional)

Check yourself

• Code changed? - Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests
• New package installed? - Tested in different environments (browser/node)

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

🦋 Changeset detected

Latest commit: 559c5c5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@redocly/cli	Patch
@redocly/openapi-core	Patch

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[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.015 ± 0.026	0.990	1.078	1.01 ± 0.03
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	1.008 ± 0.017	0.979	1.036	1.00

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.34%	4901/6256
🟡	Branches	67.05%	2027/3023
🟡	Functions	72.62%	809/1114
🟡	Lines	78.64%	4623/5879

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟡	... / miscellaneous.ts	68.29%	59.83% (+1.65% 🔼)	71.7%	68.05%

Test suite run success

794 tests passing in 118 suites.

Report generated by 🧪jest coverage report action from 559c5c5