Update index.html

Gmac4247 · web-flow · commit 3356652b566c · 2025-11-16T17:13:00.000+01:00
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diff --git a/index.html b/index.html
@@ -234,7 +234,7 @@
        "description": "The basis of volume calculation",
      "target": "https://basic-geometry.github.io",
           "mathExpression-input": {
-	"required: true,
+	"required": true,
 	"cube_edge": "5",
 	"Volume": "?"
 	},
