README: Drop the Go workspace vendoring note

The work was done in commit 1a74695 . Remove the documentation note
that we don't support it.

Signed-off-by: Erik Skultety <eskultet@redhat.com>

README.md

@@ -150,7 +150,7 @@ original Cachito.*
 
 <https://go.dev/ref/mod>
 
-Current version: 1.23 [^go-version] [^go-compat] [^workspace-vendoring]
+Current version: 1.23 [^go-version] [^go-compat]
 
 The gomod package manager works by parsing the [go.mod](https://go.dev/ref/mod#go-mod-file) file present in the source
 repository to determine which dependencies to download. Cachi2 does not parse this file on its own - rather, we rely on
@@ -177,10 +177,6 @@ See [docs/gomod.md](docs/gomod.md) for more details.
   you are or have been experiencing issues with cachi2 related to Go 1.21+, please refer to
   [docs/gomod.md](docs/gomod.md#go-121-since-cachi2-v050).
 
-[^workspace-vendoring]: Although Cachi2 supports Go 1.23, support for workspace vendoring
-  introduced in Go 1.22 hasn't been added yet (still in development) and so if your project makes
-  use of the feature cachi2 will error out.
-
 ### pip
 
 <https://pip.pypa.io/en/stable/>