Invalid instructions on SPM integration

[epicchris]

Issue

Current instructions recommend using:

.package(url: "https://github.com/matomo-org/matomo-sdk-ios.git", from: "v7.5"),

when integrating through SPM, but this will result with:

Invalid semantic version string 'v7.5'

error while doing so.

Fix

Proper integration through SPM requires:

.package(url: "https://github.com/matomo-org/matomo-sdk-ios.git", from: "7.5.0"),

README.md should also note that product within matomo-sdk-ios is called MatomoTracker, so one can integrate SPM dependency as:

dependencies: [
                .product(name: "MatomoTracker", package: "matomo-sdk-ios"),