fix(a11y): fix contrast of inline code text

RTD theme renders inline code in #e74c3c on a white background,
yielding a contrast ratio of ~3.82:1. WCAG AA / BITV 9.1.4.3
requires 4.5:1 for normal-weight text.

Switching to #c0392b (darker red) raises the ratio to ~5.4:1.

Fixes #9677

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

Author: skjnldsv

_shared_assets/static/custom.css

@@ -65,6 +65,14 @@ h6 {
 	background: rgba(0, 130, 201, 0.1)
 }
 
+/* Inline code — RTD uses #e74c3c on white which gives ~3.82:1, below
+   the 4.5:1 required by WCAG AA / BITV 9.1.4.3. Use a darker shade. */
+.rst-content code,
+.rst-content tt,
+code {
+	color: #c0392b;
+}
+
 /* Fix code within tables - remove too big margins */
 .rst-content td {
 	div[class^="highlight"]:last-of-type,