Add description on oneapi builds

Author: EZForever

README.md

@@ -25,4 +25,5 @@ Server images are tagged in the format of `server-<ssl>-<avx>`.
 - `avx`: (Only) AVX instruction set is enabled. Might be useful if you are using some old CPUs that don't support AVX2.
 - `avx2`: AVX2 instruction set is enabled. This build should support most modern/recent CPUs with reasonable performance.
 - `avx512`: AVX512 and AVX512-VNNI instruction sets are enabled. Currently only some high-end or server-grade CPUs support these instruction sets, so check your hardware specs before using this build.
+- `oneapi`: Experimental build with the Intel oneAPI compiler, inspired by ggerganov/llama.cpp#5067. Offers a ~30% speed increase (~20tok/s vs ~15tok/s) in prompt processing on my machine compared to `avx2` builds. Not updated daily.