benchmarks: update results README

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scripts/results/README.md

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-These benchmarks results are compiled on my main development machine -
-an Apple Mac Mini 2023 model with an M2 Pro chip with 12 CPU cores and 32GB of RAM;
-a 1TB SSD primary drive and a 1TB Samsung SSD 970 Evo plus external drive
-running MacOS Sonoma Public Beta.
+These benchmarks results are compiled on an Apple Mac Mini 2023 model with an M2 Pro chip
+with 12 CPU cores & 32GB of RAM; a 1TB SSD primary drive & a 1TB Samsung SSD 970 Evo plus
+external drive running MacOS Sonoma 14.0.
 
 It uses the prebuilt, CPU optimized qsv binary variant in aarch64-apple-darwin.zip
 found at https://github.com/jqnatividad/qsv/releases/latest.
+
+The benchmarks were performed on a 1 million row, 41 column, 520 MB sample of NYC's 311 data.
+https://raw.githubusercontent.com/wiki/jqnatividad/qsv/files/NYC_311_SR_2010-2020-sample-1M.7z
+
+Records per second was calculated by dividing the number of records (1M) by the mean.
+All other measurements are in seconds,