Update file footer.html

wiki/footer.html

 <footer class="pb-2 pt-2 mt-5 footer" style="background-color: #ffe4e1;border-radius: 50px; place-items: center;">
-  <div class="container">
-    <div class="row">
+  <div class="container ">
+    <div class="row place-items: center;">
       <div class="col-lg-6 col-xs-12">
           <h4 class="mt-lg-0 mt-sm-3">Follow us on social media</h4>
           <div class="row">
@@ -33,7 +33,7 @@
     <!-- The following MUST be on every page: license information and link to the repository on gitlab.igem.org -->
     <div class="row mt-4 place-items: center;">
       <div class="col">
-        <p class="mb-0"><small>© 2024 - Content on this site is licensed under a <a class="subfoot" href= "https://creativecommons.org/licenses/by/4.0/" style="color: black;" rel="license">Creative Commons Attribution 4.0 International license</a>.</small></p>
+        <p class="mb-0 place-items: center;"><small>© 2024 - Content on this site is licensed under a <a class="subfoot" href= "https://creativecommons.org/licenses/by/4.0/" style="color: black;" rel="license">Creative Commons Attribution 4.0 International license</a>.</small></p>
 	      <p><small>The repository used to create this website is available at <a href="https://gitlab.igem.org/2024/tsinghua" style="color: black;" >gitlab.igem.org/2024/tsinghua</a>.</small></p>
       </div>
     </div>