Adjustments due to speaker availability

We had to move some sessions, so if you were planning on seeing them, check their new dates or locations:

• “NixOS on RISCV” by liberodark (Sept. 26, 2026, 5:20 p.m. → Sept. 26, 2026, 5:40 p.m.)
• “Lightning Talk: Flox” (Sept. 26, 2026, 5:50 p.m. → Sept. 27, 2026, 5:10 p.m.)