git: new version 2.28 (#17848)

* git: new version 2.28

* git: man page version 2.28

var/spack/repos/builtin/packages/git/package.py

@@ -23,6 +23,11 @@ class Git(AutotoolsPackage):
     #       https://www.kernel.org/pub/software/scm/git/git-manpages-{version}.tar.gz
     # You can find the source here: https://mirrors.edge.kernel.org/pub/software/scm/git/sha256sums.asc
     releases = [
+        {
+            'version': '2.28.0',
+            'sha256': 'f914c60a874d466c1e18467c864a910dd4ea22281ba6d4d58077cb0c3f115170',
+            'sha256_manpages': '3cfca28a88d5b8112ea42322b797a500a14d0acddea391aed0462aff1ab11bf7'
+        },
         {
             'version': '2.27.0',
             'sha256': '77ded85cbe42b1ffdc2578b460a1ef5d23bcbc6683eabcafbb0d394dffe2e787',