fix: Fix bundler&cli MSRV

[FabianLars]

I added the bundler and cli to the msrv check and while trying to downgrade all the crates to the bundler's MSRV (1.60) it appeared that the bundler and cli were effectively already on 1.70/1.71 (both in code syntax and cargo.toml deps) and downgrading them required more changes than i'd like to do.

Therefore this isn't really a breaking change and imo should be fine to be part of a simple patch release.
1.70 is a bit over 1 year old now.

The bundler and cli msrv checks are seperate because a) i tried to adhere to 1.60 for the bundler first and b) we bump the cli msrv more often at which point a seperate check will be required anyway.

[github-actions]

Package Changes Through 98ab0a9

There are 9 changes which include tauri with patch, tauri-codegen with patch, tauri-bundler with patch, tauri-cli with patch, @tauri-apps/cli with patch, tauri-utils with patch, tauri-build with patch, tauri-runtime with patch, tauri-runtime-wry with patch

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
tauri-utils	1.6.0	1.6.1
tauri-bundler	1.6.0	1.6.1
tauri-runtime	0.14.4	0.14.5
tauri-runtime-wry	0.14.9	0.14.10
tauri-codegen	1.4.4	1.4.5
tauri-macros	1.4.5	1.4.6
tauri-build	1.5.3	1.5.4
tauri	1.7.1	1.7.2
@tauri-apps/cli	1.6.0	1.6.1
tauri-cli	1.6.0	1.6.1

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[FabianLars]

I'll be afk for a few hours so if any of the ci checks fail i'll need a while to fix them nevermind, see ya tomorrow (CI is happy any way)