📝 Add @mxrtinez as a contributor

.all-contributorsrc

+{
+  "projectName": "LA-CoNGA Courses ",
+  "projectOwner": "laconga",
+  "repoType": "gitlab",
+  "repoHost": "https://gitmilab.redclara.net",
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": true,
+  "commitConvention": "atom",
+  "contributors": [
+    {
+      "login": "mxrtinez",
+      "name": "Alexander Martínez Méndez",
+      "avatar_url": "https://secure.gravatar.com/avatar/5da5ac4ba8f7b66236bc8e5c306c636c?s=80&d=identicon",
+      "profile": "https://gitmilab.redclara.net/mxrtinez",
+      "contributions": [
+        "code"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7
+}

README.md

 <!--
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 [![pipeline status](https://gitmilab.redclara.net/tutoriales/tutorial-mkdocs/badges/master/pipeline.svg)](https://gitmilab.redclara.net/tutoriales/tutorial-mkdocs/-/commits/master)
 -->
 <div align="center">
@@ -142,6 +145,19 @@ We are grateful to the Ecuadorian National Research and Education Network _CEDIA
 ## Contributors ✨
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://gitmilab.redclara.net/mxrtinez"><img src="https://secure.gravatar.com/avatar/5da5ac4ba8f7b66236bc8e5c306c636c?s=80&d=identicon?s=100" width="100px;" alt=""/><br /><sub><b>Alexander Martínez Méndez</b></sub></a><br /><a href="https://gitmilab.redclara.net/laconga/LA-CoNGA Courses /commits/master" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->