Correct a management UI metric description

Closes #4493

(cherry picked from commit 6ac4d30)
(cherry picked from commit 5d5e002)
(cherry picked from commit 2a62957)

Author: michaelklishin

deps/rabbitmq_management/priv/www/js/global.js

@@ -440,7 +440,7 @@ var HELP = {
 
     'memory-calculation-strategy-breakdown' : '<p>The setting <code>vm_memory_calculation_strategy</code> defines which of the below memory values is used to check if the memory usage reaches the watermark or paging to disk is required.</p><p><a target="_blank" href="https://www.rabbitmq.com/memory-use.html">Read more</a> on memory use.</p>',
 
-    'memory-calculation-strategy' : '<p>This value can be calculated using different strategies the <code>vm_memory_calculation_strategy</code> config setting.</p><p><a target="_blank" href="https://www.rabbitmq.com/memory-use.html">Read more</a> on memory use.</p>',
+    'memory-calculation-strategy' : '<p>This value can be calculated using different strategies, see the <code>vm_memory_calculation_strategy</code> configuration setting.</p><p><a target="_blank" href="https://www.rabbitmq.com/memory-use.html">Read more</a> on memory use.</p>',
 
     'binary-use' : '<p>Binary accounting is not exact; binaries are shared between processes (and thus the same binary might be counted in more than one section), and the VM does not allow us to track binaries that are not associated with processes (so some binary use might not appear at all).</p>',