Fix blog link

Fixes #172

Author: pgleeson

contacts.html

@@ -74,7 +74,7 @@ <h1 style="float: left;">Interact with us on social media!</h1><i class="fa fa-t
 		  	<div class="clearer"></div>
 		    </div>
 		    <p class="lead">
-		  	For ongoing information about OpenWorm, please follow our <a href="http://blog.openworm.org/" target="_blank">blog</a> on tumblr.
+		  	For ongoing information about OpenWorm, please follow our <a href="https://openworm.tumblr.com/" target="_blank">blog</a> on tumblr.
 			You can also follow us and interact on <a href="https://twitter.com/OpenWorm" target="_blank">Twitter</a> and <a href="https://www.facebook.com/OpenWorm" target="_blank">Facebook</a> for more frequent updates.
 		    </p>
 		    <div class="large-spacer"></div>

footer-content.html

@@ -2,7 +2,7 @@
     <div class="container">
 	<ul class="footer-links">
 	    <li>
-		<a href="http://blog.openworm.org">Blog</a>
+		<a href="https://openworm.tumblr.com/">Blog</a>
 	    </li>
 	    <li class="muted">
 		&middot;

get_involved.html

@@ -99,7 +99,7 @@ <h1>Coder</h1>
 				<br/><br/>
 
 				We have provided an extensive guide to getting started with the project in
-				<a href="http://docs.openworm.org/#contributing-to-openworm" target="_blank">our documentation</a>.
+				<a href="http://docs.openworm.org/#contributing-to-openworm" target="_blank">our documentation</a>. Also, have a look at the overview of <a href="https://github.com/openworm/.github/blob/main/testsheet/README.md" target="_blank">currently active projects</a>.
 				Please start there and if you have any questions do not hesitate to <a href="./contacts.html">contact us</a>.
 
 			    </p>