[alg.rand.generate] Add generate_random to index (#7774)

Author: Eisenwave

source/algorithms.tex

@@ -11865,6 +11865,7 @@
 
 \rSec2[alg.rand.generate]{\tcode{generate_random}}
 
+\indexlibraryglobal{generate_random}%
 \begin{itemdecl}
 template<class R, class G>
   requires @\libconcept{output_range}@<R, invoke_result_t<G&>> && @\libconcept{uniform_random_bit_generator}@<remove_cvref_t<G>>
@@ -11907,6 +11908,7 @@
 \end{note}
 \end{itemdescr}
 
+\indexlibraryglobal{generate_random}%
 \begin{itemdecl}
 template<class G, @\libconcept{output_iterator}@<invoke_result_t<G&>> O, @\libconcept{sentinel_for}@<O> S>
   requires @\libconcept{uniform_random_bit_generator}@<remove_cvref_t<G>>
@@ -11922,6 +11924,7 @@
 \end{codeblock}
 \end{itemdescr}
 
+\indexlibraryglobal{generate_random}%
 \begin{itemdecl}
 template<class R, class G, class D>
   requires @\libconcept{output_range}@<R, invoke_result_t<D&, G&>> && @\libconcept{invocable}@<D&, G&> &&
@@ -11973,6 +11976,7 @@
 \end{note}
 \end{itemdescr}
 
+\indexlibraryglobal{generate_random}%
 \begin{itemdecl}
 template<class G, class D, @\libconcept{output_iterator}@<invoke_result_t<D&, G&>> O, @\libconcept{sentinel_for}@<O> S>
   requires @\libconcept{invocable}@<D&, G&> && @\libconcept{uniform_random_bit_generator}@<remove_cvref_t<G>> &&