Fix reference to test file in test 7

tools/falco/falco.xml

@@ -148,7 +148,7 @@
                   <has_line_matching expression="&lt;html&gt;&lt;head&gt;.+&lt;title&gt;     1000trimmed_fastq - report.+"/>
                 </assert_contents>
             </output>
-            <output name="summary_file" file="fastqc_data_customlimits_summary" ftype="txt"/>
+            <output name="summary_file" file="fastqc_data_customlimits_summary.txt" ftype="txt"/>
         </test>
         <!-- ## The kmers param is ignored in Falco and always set to 7. If this ever gets reconsidered, this test could be uncommented.
         <test expect_num_outputs="2">