docs: add BlacCello as a contributor for code (#26295)

Adds @BlacCello as a contributor for code.

This was requested by stavros-k [in this
comment](https://github.com/truecharts/charts/pull/26254#issuecomment-2347190459)

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -2442,6 +2442,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "BlacCello",
+      "name": "Marcel Henrich",
+      "avatar_url": "https://avatars.githubusercontent.com/u/18525266?v=4",
+      "profile": "https://github.com/BlacCello",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

.github/README.md

@@ -71,7 +71,7 @@ To contact the TrueCharts project:
 ## Contributors ✨
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-262-orange.svg?style=for-the-badge)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-263-orange.svg?style=for-the-badge)](#contributors)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
@@ -420,6 +420,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://www.linkedin.com/in/saadawan2/"><img src="https://avatars.githubusercontent.com/u/10093984?v=4?s=100" width="100px;" alt="Saad Awan"/><br /><sub><b>Saad Awan</b></sub></a><br /><a href="https://github.com/truecharts/charts/commits?author=KnightDoom" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/Joker9944"><img src="https://avatars.githubusercontent.com/u/9194199?v=4?s=100" width="100px;" alt="Felix von Arx"/><br /><sub><b>Felix von Arx</b></sub></a><br /><a href="https://github.com/truecharts/charts/commits?author=Joker9944" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/yodatak"><img src="https://avatars.githubusercontent.com/u/704477?v=4?s=100" width="100px;" alt="yodatak"/><br /><sub><b>yodatak</b></sub></a><br /><a href="https://github.com/truecharts/charts/commits?author=yodatak" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/BlacCello"><img src="https://avatars.githubusercontent.com/u/18525266?v=4?s=100" width="100px;" alt="Marcel Henrich"/><br /><sub><b>Marcel Henrich</b></sub></a><br /><a href="https://github.com/truecharts/charts/commits?author=BlacCello" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>