Finish renaming the former 'Fixed by vulnerabilities' column #1520

Reference: #1520
Related prior issue: #1501
Updates: #1519
Signed-off-by: John M. Horan <johnmhoran@gmail.com>

vulnerabilities/templates/packages.html

@@ -48,7 +48,7 @@
                             <span
                                 class="has-tooltip-multiline has-tooltip-black has-tooltip-arrow has-tooltip-text-left"
                                 data-tooltip="This is the number of vulnerabilities fixed by the package.">
-                                <span class="affected-fixed">Fixed</span> vulnerabilities
+                                <span class="affected-fixed">Fixing</span> vulnerabilities
                             </span>
                         </th>
                     </tr>