Change syntax highlighting (#213)

- Specifically, remove highlighting for the purpose of code blocks
with equations for converting raw ADC values to voltage

Author: cjsha

template/public/main.css

@@ -106,4 +106,11 @@ ol li div {
 
 [data-bs-theme=light] #logo {
   content:url("../logo-light-mode.svg");
+}
+
+/* Avoid syntax highlighting in code blocks that have an equation to convert ADC values to
+voltage. For example, navigate to the api/OpenEphys.Onix1.NeuropixelsV1DataFrame.html page to find
+the following equation: `Electrode Voltage (µV) = 1,171.875 / LFPGain × (ADCSample – 512)` */
+.hljs-title {
+  color:black
 }