README.md: use https for the Bootstrap logo. (#23458)

diff --git a/README.md b/README.md
index 552066cc25a08f5f3f237e8c1eaad73044626e9f..3f988e19601d588f9648b643e9a931bfd0d22bd8 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 <p align="center">
   <a href="https://getbootstrap.com">
-    <img src="http://getbootstrap.com/assets/brand/bootstrap-solid.svg" width=72 height=72>
+    <img src="https://getbootstrap.com/assets/brand/bootstrap-solid.svg" width=72 height=72>
   </a>
 
   <h3 align="center">Bootstrap</h3>