Update dependency gTTS to v2.5.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
gTTS (changelog)	==2.2.4 -> ==2.5.4

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Release Notes

pndurette/gTTS (gTTS)

v2.5.4

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Bug Fixes

• langs: Language added: fr-CA (French (Canada)) (#​490) (defc400)

v2.5.3

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Bug Fixes

• langs: Languages added: pt-PT (Portuguese (Portugal)), yue (Cantonese); languages modified: pa (Punjabi (Gurmukhi)), pt (Portuguese (Brazil)) (72a7e57)

v2.5.2

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Bug Fixes

• langs: Languages added: am (Amharic), cy (Welsh), eu (Basque), gl (Galician), ha (Hausa), lt (Lithuanian), pa (Punjabi) (#​477) (b04d6d1)

v2.5.1

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Bug Fixes

• Flush file after saving (#​448) (262c532)

v2.5.0

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Features

• Add connection timeout + misc improvements (#​440) (bcdb79d)

v2.4.0

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Features

• Add Python 3.12 support (75294b2)
• Remove Python 3.7 support (end-of-life) (75294b2)

v2.3.2

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Bug Fixes

• Add new error helper for when using a custom (non-.com) TLD results in a 404 (5a860ed)
• cli: Add deprecated language fallback support to CLI (5a860ed)

Documentation

• cli: Fix older invalid example (5a860ed)

v2.3.1

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Bug Fixes

• test: include missing required *.txt test files in dist (#​395) (63f10ff)
• loosen dependancies for click and requests, removes six dependancy (#​394) (a4ce0c9)
• test: missing @pytest.mark.net on net-enabled test (#​391) (3667f06)
• test: remove mock package test dependancy (#​390) (9b54fc1)

v2.3.0

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Features

• centralizes project metadata and config into a single pyproject.toml (25d3c1c)
• drops support for Python 2.7 (long overdue), Python 3.6 (end-of-life) (25d3c1c)
• modernize package config and build/release workflow (25d3c1c)
• Simplify language generator (5dbdf10)

Bug Fixes

• Languages added: zh-CN (Chinese (Simplified)), zh-TW (Chinese (Traditional)) (5dbdf10)
• Languages removed: cy (Welsh), eo (Esperanto), mk (Macedonian), ms (Malay), zh-CN (Chinese) (5dbdf10)

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