Use caret shorthand and tags URL

Author: petk

book/01-introduction/sections/installing.asc

@@ -114,7 +114,7 @@ $ sudo ln -s /usr/bin/db2x_docbook2texi /usr/bin/docbook2x-texi
 due to binary name differences.
 
 When you have all the necessary dependencies, you can go ahead and grab the latest tagged release tarball from several places.
-You can get it via the kernel.org site, at https://www.kernel.org/pub/software/scm/git[], or the mirror on the GitHub website, at https://github.com/git/git/releases[^].
+You can get it via the kernel.org site, at https://www.kernel.org/pub/software/scm/git[^], or the mirror on the GitHub website, at https://github.com/git/git/tags[^].
 It's generally a little clearer what the latest version is on the GitHub page, but the kernel.org page also has release signatures if you want to verify your download.
 
 Then, compile and install:

book/06-github/sections/2-contributing.asc

@@ -58,7 +58,7 @@ Go to the https://cli.github.com/[GitHub CLI homepage^] for installation instruc
 
 ===== Creating a Pull Request
 
-Tony is looking for code to run on his Arduino programmable microcontroller and has found a great program file on GitHub at https://github.com/schacon/blink[].
+Tony is looking for code to run on his Arduino programmable microcontroller and has found a great program file on GitHub at https://github.com/schacon/blink[^].
 
 .The project we want to contribute to
 image::images/blink-01-start.png[The project we want to contribute to]