Update dependency package_info_plus to v8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
package_info_plus (source)	dependencies	major	^6.0.0 -> ^8.0.0

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[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

fluttercommunity/plus_plugins (package_info_plus)

### [`v8.0.0`](https://togithub.com/fluttercommunity/plus_plugins/blob/HEAD/packages/package_info_plus/package_info_plus/CHANGELOG.md#800) [Compare Source](https://togithub.com/fluttercommunity/plus_plugins/compare/package_info_plus-v7.0.0...package_info_plus-v8.0.0) > Note: This release has breaking changes. - **DOCS**(package_info_plus): Add platform specific documentation ([#​2845](https://togithub.com/fluttercommunity/plus_plugins/issues/2845)). ([ad06a236](https://togithub.com/fluttercommunity/plus_plugins/commit/ad06a236d7647e958f4b25cd9ee8fe68f4c4faf3)) - **DOCS**(package_info_plus): Improve web documentation re. CORS ([#​2841](https://togithub.com/fluttercommunity/plus_plugins/issues/2841)). ([7d712ef8](https://togithub.com/fluttercommunity/plus_plugins/commit/7d712ef816808d533b2fd0b4f8c9f11ebb23ab53)) - **BREAKING** **FEAT**(package_info_plus): Switch to SHA-256 for `buildSignature` on Android ([#​2835](https://togithub.com/fluttercommunity/plus_plugins/issues/2835)). ([7259af20](https://togithub.com/fluttercommunity/plus_plugins/commit/7259af200810bd717d95688fbcdca67a028f9cd0)) ### [`v7.0.0`](https://togithub.com/fluttercommunity/plus_plugins/blob/HEAD/packages/package_info_plus/package_info_plus/CHANGELOG.md#700) [Compare Source](https://togithub.com/fluttercommunity/plus_plugins/compare/package_info_plus-v6.0.0...package_info_plus-v7.0.0) > Note: This release has breaking changes. - **REFACTOR**(package_info_plus): Migrate Android example to use the new plugins declaration ([#​2715](https://togithub.com/fluttercommunity/plus_plugins/issues/2715)). ([33681cd9](https://togithub.com/fluttercommunity/plus_plugins/commit/33681cd91982d4db8e6d3d0e1ccf7c604091e48f)) - **BREAKING** **FEAT**(package_info_plus): Support multiple version.json locations in web ([#​2733](https://togithub.com/fluttercommunity/plus_plugins/issues/2733)). ([26047f30](https://togithub.com/fluttercommunity/plus_plugins/commit/26047f3062ea23f8e124f1c64e03dd8a566e9bac))

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