fix typos in manual.yml (#2102)

docs/content/manual/manual.yml

@@ -217,7 +217,7 @@ sections:
 
       * `-e` / `--exit-status`:
 
-        Sets the exit status of jq to 0 if the last output values was
+        Sets the exit status of jq to 0 if the last output value was
         neither `false` nor `null`, 1 if the last output value was
         either `false` or `null`, or 4 if no valid result was ever
         produced.  Normally jq exits with 2 if there was any usage