sync stale cppcheck suppression line numbers

The line-anchored knownConditionTrueFalse suppressions had drifted
out of sync with their source lines, causing both unmatchedSuppression
and now-unsuppressed errors in the cppcheck CI step:

- kruskal_tree.hpp: 13 -> 15 (shifted by the clang-format reflow in
  the previous commit)
- suffix_array.hpp: 62 -> 63 (pre-existing drift)
- suffix_array_short.hpp: 34 -> 35 (pre-existing drift)

Author: cameroncuster

tests/.config/.cppcheck_suppression_list

@@ -39,9 +39,9 @@ syntaxError:../library/loops/submasks.hpp:8
 syntaxError:../library/loops/supermasks.hpp:8
 syntaxError:../library/math/prime_sieve/mobius.hpp:6
 syntaxError:../library/trees/lca_rmq/iterate_subtree.hpp:6
-knownConditionTrueFalse:../library/strings/suffix_array/suffix_array.hpp:62
-knownConditionTrueFalse:../library/strings/suffix_array/suffix_array_short.hpp:34
-knownConditionTrueFalse:../library/dsu/kruskal_tree.hpp:13
+knownConditionTrueFalse:../library/strings/suffix_array/suffix_array.hpp:63
+knownConditionTrueFalse:../library/strings/suffix_array/suffix_array_short.hpp:35
+knownConditionTrueFalse:../library/dsu/kruskal_tree.hpp:15
 knownConditionTrueFalse:../library/dsu/dsu.hpp:11
 knownConditionTrueFalse:../library/dsu/dsu_weighted.hpp:29
 constVariable:../kactl/content/numerical/NumberTheoreticTransform.h:30