Makefile: update i18n helpers, switch to linkcheck2

The update is necessary to accomodate for mdbook 0.5.0.
The fork is necessary for 0.5.0 as well, because the original is no
longer maintained, as it seems.
TODO: Adjust GitHub CI, but that requires the Action to align.
See: jontze/action-mdbook#671

Signed-off-by: 지지 ᚠד (Jiji Freya Daniel) Maslowski <info@orangecms.org>

Author: orangecms

Makefile

@@ -12,10 +12,10 @@ run:
 	mdbook serve
 
 prepare_i18n:
-	cargo install mdbook-i18n-helpers --locked --version 0.3.4
+	cargo install mdbook-i18n-helpers --locked --version 0.4.0
 
 prepare: prepare_i18n
 	cargo install mdbook
 	cargo install mdbook-mermaid
 	mdbook-mermaid install
-	cargo install mdbook-linkcheck
+	cargo install mdbook-linkcheck2

book.toml

@@ -18,7 +18,7 @@ additional-js = [
 [build]
 extra-watch-dirs = ["po"]
 
-[output.linkcheck]
+[output.linkcheck2]
 
 [preprocessor]