Wrap-git files can have tags as well as commit ids. [skip ci]

docs/markdown/Wrap-dependency-system-manual.md

@@ -93,9 +93,9 @@ revision=head
 The format is straightforward. The only thing to note is the revision
 element that can have one of two values. The first is `head` which
 will cause Meson to track the master head (doing a repull whenever the
-build definition is altered). The second type is a commit hash. In
-this case Meson will use the commit specified (with `git checkout
-[hash id]`).
+build definition is altered). The second type is a commit hash or a
+tag. In this case Meson will use the commit specified (with `git
+checkout [hash/tag id]`).
 
 Note that in this case you cannot specify an extra patch file to
 use. The git repo must contain all necessary Meson build definitions.