feat!: Add color customization for excludeDaysLabel (DenverCoder1#526)

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: DenverCoder1

README.md

@@ -59,6 +59,7 @@ If the `theme` parameter is specified, any color customizations specified will b
 |     `currStreakLabel`      |               Current streak label               |                             **hex code** without `#` or **css color**                              |
 |        `sideLabels`        |         Total and longest streak labels          |                             **hex code** without `#` or **css color**                              |
 |          `dates`           |              Date range text color               |                             **hex code** without `#` or **css color**                              |
+|     `excludeDaysLabel`     |       Excluded days of the week text color       |                             **hex code** without `#` or **css color**                              |
 |       `date_format`        |  Date format pattern or empty for locale format  |                        See note below on [📅 Date Formats](#-date-formats)                         |
 |          `locale`          |  Locale for labels and numbers (Default: `en`)   |                            ISO 639-1 code - See [🗪 Locales](#-locales)                             |
 |           `type`           |          Output format (Default: `svg`)          |                              Current options: `svg`, `png` or `json`                               |

src/card.php

@@ -417,7 +417,7 @@ function generateCard(array $stats, array $params = null): string
         $excludedDays = "<g style='isolation: isolate'>
                 <!-- Excluded Days -->
                 <g transform='translate({$offset},187)'>
-                    <text stroke-width='0' text-anchor='right' fill='{$theme["dates"]}' stroke='none' font-family='\"Segoe UI\", Ubuntu, sans-serif' font-weight='400' font-size='10px' font-style='normal' style='opacity: 0; animation: fadein 0.5s linear forwards 0.9s'>
+                    <text stroke-width='0' text-anchor='right' fill='{$theme["excludeDaysLabel"]}' stroke='none' font-family='\"Segoe UI\", Ubuntu, sans-serif' font-weight='400' font-size='10px' font-style='normal' style='opacity: 0; animation: fadein 0.5s linear forwards 0.9s'>
                         * {$localeTranslations["Excluding"]} {$daysCommaSeparated}
                     </text>
                 </g>