chore: reduce recommended npm version

[DmitryAnansky]

What/Why/How?

Reduce recommended npm version to 9.5 as it has a number of security fixes and compatible with recommended node js version.

Reference

Testing

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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]

⚠️ No Changeset found

Latest commit: 794359c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	973.7 ± 10.9	957.5	990.2	1.00
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	981.9 ± 20.7	958.3	1032.3	1.01 ± 0.02

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.6%	5053/6429
🟡	Branches	67.18%	2059/3065
🟡	Functions	73.16%	834/1140
🟡	Lines	78.88%	4767/6043

Test suite run success

836 tests passing in 120 suites.

Report generated by 🧪jest coverage report action from 794359c

[tatomyr]

Do we use any specific npm version in smoke tests? Maybe we have to add it to test there?

[DmitryAnansky]

Do we use any specific npm version in smoke tests? Maybe we have to add it to test there?

no - we only point nodeJS version like this

        with:
          node-version: 22

and correspondent version of npm installed.
I don't think we should change this.