games/pysolfc: Update to 3.6.1

• The main tarball is now all lowercase, thus update the relevant bits and remove WRKSRC, which no longer needs to be explicitly set.

Changelog:

https://github.com/shlomif/PySolFC/blob/pysolfc-3.6.1/NEWS.asciidoc

MFH: 2026Q3
(cherry picked from commit 2caf45d96f0fcaf9c7b152fe37369c4092fa57a3)