Fix icon names in BootstrapIconUtility (#1086)

Removed invisible characters from IconName.Calendar2
and IconName.Calendar2Check in BootstrapIconUtility.cs.
Updated values to "calendar2" and "calendar2-check"
for improved functionality and consistency.

Co-authored-by: Jens-Christian Skibakk <[email protected]>

Author: jenscski

blazorbootstrap/Utils/BootstrapIconUtility.cs

@@ -366,8 +366,8 @@ public static string ToIconName(IconName iconName)
                    IconName.Calculator => "calculator",
                    IconName.CalculatorFill => "calculator-fill",
                    IconName.Calendar => "calendar",
-                   IconName.Calendar2 => "​calendar2",
-                   IconName.Calendar2Check => "​calendar2-check",
+                   IconName.Calendar2 => "calendar2",
+                   IconName.Calendar2Check => "calendar2-check",
                    IconName.Calendar2CheckFill => "calendar2-check-fill",
                    IconName.Calendar2Date => "calendar2-date",
                    IconName.Calendar2DateFill => "calendar2-date-fill",