[algorithm.syn] Fix indentation (#8226)

Author: Andreas-Krug

source/algorithms.tex

@@ -1282,7 +1282,7 @@
              @\libconcept{indirect_binary_predicate}@<projected<I, Proj>,
                                        projected<I, Proj>> Pred = ranges::equal_to>
       I adjacent_find(Ep&& exec, I first, S last, Pred pred = {},
-                                Proj proj = {});                            // freestanding-deleted
+                      Proj proj = {});                                      // freestanding-deleted
     template<@\exposconcept{execution-policy}@ Ep, @\exposconcept{sized-random-access-range}@ R, class Proj = identity,
              @\libconcept{indirect_binary_predicate}@<projected<iterator_t<R>, Proj>,
                                        projected<iterator_t<R>, Proj>> Pred = ranges::equal_to>