Replace static Qt build for Windows

[GriffinRichards]

Currently our Windows release builds use a static build of Qt 6.0.1. A few features are currently disabled on Windows because this Qt build doesn't support them:

• The Summary Charts feature on the Wild Pokémon tab relies on the QtCharts module, which wasn't linked on this build. Once replaced with a build that does link this module, the feature can be reenabled by adding the module unconditionally here in porymap.pro.
• The Check for Updates feature relies on the QtNetwork module. This wasn't linked in porymap.pro until after our static Qt build was created, but the Windows build still compiles, so it's possible it does link QtNetwork. In any case the feature doesn't work on Windows releases and is currently disabled. A cursory search of similar issues seemed to imply we need to link OpenSSL as well.
• There's a handful of features introduced in later Qt versions that we could make use of as well, if we bump our lowest supported version