lang/rust: always build rustdoc

Due to a regression in rust [1], rustdoc is not built anymore but
is required by some ports.
Force the build of rustdoc.

[1] rust-lang/rust@11e002a

PR:		271036

lang/rust/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	rust
 PORTVERSION?=	1.69.0
-PORTREVISION?=	0
+PORTREVISION?=	1
 CATEGORIES=	lang
 MASTER_SITES=	https://static.rust-lang.org/dist/:src \
 		https://dev-static.rust-lang.org/dist/:src \
@@ -80,7 +80,7 @@ _RUST_ARCH_i386=	i686
 _RUST_ARCH_riscv64=	riscv64gc
 _RUST_TARGET=		${_RUST_ARCH_${ARCH}:U${ARCH}}-unknown-${OPSYS:tl}
 _RUST_TARGETS=		${_RUST_TARGET}
-_RUST_TOOLS=		analysis cargo clippy rustfmt
+_RUST_TOOLS=		analysis cargo clippy rustdoc rustfmt
 
 _RUSTC_BOOTSTRAP=	${BOOTSTRAPS_DATE_${ARCH}:U${BOOTSTRAPS_DATE}}/rustc-${RUST_BOOTSTRAP_VERSION_${ARCH}:U${RUST_BOOTSTRAP_VERSION}}-${_RUST_TARGET}
 _RUST_STD_BOOTSTRAP=	${BOOTSTRAPS_DATE_${ARCH}:U${BOOTSTRAPS_DATE}}/rust-std-${RUST_BOOTSTRAP_VERSION_${ARCH}:U${RUST_BOOTSTRAP_VERSION}}-${_RUST_TARGET}