Update README.md

Author: httpsGuibr

README.md

@@ -82,3 +82,9 @@
 <img src="https://raw.githubusercontent.com/HttpsguiBr/HttpsguiBr/output/snake.svg" alt="Snake animation" />
 
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+
+<picture align="center">
+  <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/mari4souza/mari4souza/output/github-contribution-grid-snake-dark.svg">
+  <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/mari4souza/mari4souza/output/github-contribution-grid-snake-dark.svg">
+  <img align="center" alt="github contribution grid snake animation" src="https://raw.githubusercontent.com/mari4souza/mari4souza/output/github-contribution-grid-snake.svg">
+</picture>