🔨 Update docs Termynal scripts to not include line nums for local dev (#1018)

Author: tiangolo

docs/css/custom.css

@@ -8,6 +8,10 @@
     white-space: pre-wrap;
 }
 
+.termy .linenos {
+    display: none;
+}
+
 a.external-link::after {
     /* \00A0 is a non-breaking space
         to make the mark be on the same line as the link

docs/js/custom.js

@@ -13,7 +13,7 @@ function setupTermynal() {
 
     function createTermynals() {
         document
-            .querySelectorAll(`.${termynalActivateClass} .highlight`)
+            .querySelectorAll(`.${termynalActivateClass} .highlight code`)
             .forEach(node => {
                 const text = node.textContent;
                 const lines = text.split("\n");