You're a bit off, chief. The Pentium was introduced in 1993, nearly a year after Windows 3.1 and nearly 2 years before Windows 95. The next design out of Intel (and I use the term loosely) was the Pentium MMX in 1996.
Anyhow, whenever CPU and OS releases line up it's purely accidental. Intel produces CPUs on their own schedule, and Microsoft certainly doesn't hold back OSes for Intel CPUs.