Update jinja template to use floats instead of int

This fixes a crash in the generation of the pdf report when there is
expression of the MECOM gene. If there is MECOM expression, the read
counts are actually floats, not integers, which leads to a crash.

report/templates/contents_expr.html.j2

@@ -21,9 +21,9 @@
       {% for item in results.expr %}
       <tr>
         <td class="text-left">{{ item.exon }}</td>
-        <td class="text-right">{{ item.count|show_int }}</td>
+        <td class="text-right">{{ item.count|show_float}}</td>
         <td class="text-left">{{ item.divisor_gene }}</td>
-        <td class="text-right">{{ item.divisor_exp|show_int }}</td>
+        <td class="text-right">{{ item.divisor_exp|show_float }}</td>
         <td class="text-right">{{ item.ratio|show_float }}</td>
         <td class="text-left">{{ item.above_threshold }}</td>
       </tr>