textproc/mdbook: Update to 0.4.48

ChangeLog:
https://github.com/rust-lang/mdBook/blob/master/CHANGELOG.md#mdbook-0448

textproc/mdbook/Makefile

 PORTNAME=	mdbook
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.4.47
+DISTVERSION=	0.4.48
 CATEGORIES=	textproc
 
 MAINTAINER=	eduardo@FreeBSD.org

textproc/mdbook/distinfo

-TIMESTAMP = 1741548631
+TIMESTAMP = 1743507473
 SHA256 (rust/crates/addr2line-0.24.2.crate) = dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1
 SIZE (rust/crates/addr2line-0.24.2.crate) = 39015
 SHA256 (rust/crates/adler2-2.0.0.crate) = 512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627
@@ -555,5 +555,5 @@ SHA256 (rust/crates/zerovec-0.10.4.crate) = aa2b893d79df23bfb12d5461018d408ea19d
 SIZE (rust/crates/zerovec-0.10.4.crate) = 126398
 SHA256 (rust/crates/zerovec-derive-0.10.3.crate) = 6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6
 SIZE (rust/crates/zerovec-derive-0.10.3.crate) = 19438
-SHA256 (rust-lang-mdBook-v0.4.47_GH0.tar.gz) = 846a59ca86bcd014322267995ba307cd6a197081f4b75d085596d723dd8a633e
-SIZE (rust-lang-mdBook-v0.4.47_GH0.tar.gz) = 1551584
+SHA256 (rust-lang-mdBook-v0.4.48_GH0.tar.gz) = 65021ceca2a2f5a1ceda243953ce764bf34c466b7a83db38e167a2b7d1131dcf
+SIZE (rust-lang-mdBook-v0.4.48_GH0.tar.gz) = 1556726