Rollup merge of #101420 - kraktus:doc_hir_local, r=cjgillot

Fix `hir::Local` doc to match with the variable name used: `init`

compiler/rustc_hir/src/hir.rs

@@ -1321,7 +1321,7 @@ pub enum StmtKind<'hir> {
     Semi(&'hir Expr<'hir>),
 }
 
-/// Represents a `let` statement (i.e., `let <pat>:<ty> = <expr>;`).
+/// Represents a `let` statement (i.e., `let <pat>:<ty> = <init>;`).
 #[derive(Debug, HashStable_Generic)]
 pub struct Local<'hir> {
     pub pat: &'hir Pat<'hir>,