doc: fix latex error (leanprover-community#31382)

There was an error in the latex code which breaks the doc at [ProbabilityTheory.Kernel.iIndepFun.iIndepFun_process](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Probability/Independence/Process.html#ProbabilityTheory.Kernel.iIndepFun.iIndepFun_process) and lower in the same file.

Author: EtienneC30

Mathlib/Probability/Independence/Process.lean

@@ -87,7 +87,7 @@ lemma IndepFun.process_indepFun_process {T : Type*} {𝓧 : S → Type*} {𝓨 :
   exact IndepFun.indepFun_process (measurable_pi_lambda _ fun _ ↦ hX _) hY fun J ↦ h I J
 
 /-- Stochastic processes $((X^s_t)_{t \in T_s})_{s \in S}$ are mutually independent if
-for all $s_1, ..., s_n$ and all $t^{s_i}_1, ..., t^{s_i}_{p_i}^ the families
+for all $s_1, ..., s_n$ and all $t^{s_i}_1, ..., t^{s_i}_{p_i}$ the families
 $(X^{s_1}_{t^{s_1}_1}, ..., X^{s_1}_{t^{s_1}_{p_1}}), ...,
 (X^{s_n}_{t^{s_n}_1}, ..., X^{s_n}_{t^{s_n}_{p_n}})$ are mutually independent. -/
 lemma iIndepFun.iIndepFun_process {T : S → Type*} {𝓧 : (i : S) → (j : T i) → Type*}
@@ -169,7 +169,7 @@ lemma IndepFun.process_indepFun_process {T : Type*} {𝓧 : S → Type*} {𝓨 :
   Kernel.IndepFun.process_indepFun_process hX hY h
 
 /-- Stochastic processes $((X^s_t)_{t \in T_s})_{s \in S}$ are mutually independent if
-for all $s_1, ..., s_n$ and all $t^{s_i}_1, ..., t^{s_i}_{p_i}^ the families
+for all $s_1, ..., s_n$ and all $t^{s_i}_1, ..., t^{s_i}_{p_i}$ the families
 $(X^{s_1}_{t^{s_1}_1}, ..., X^{s_1}_{t^{s_1}_{p_1}}), ...,
 (X^{s_n}_{t^{s_n}_1}, ..., X^{s_n}_{t^{s_n}_{p_n}})$ are mutually independent. -/
 lemma iIndepFun.iIndepFun_process {T : S → Type*} {𝓧 : (i : S) → (j : T i) → Type*}