Remove revision param of johnwason/vcpkg-action

A new stable release of vcpkg
(https://github.com/microsoft/vcpkg/releases/tag/2026.06.24) is
available that includes svt-av1 version 3.1.2#1.

.github/actions/setup-windows/action.yml

diff --git a/.github/actions/setup-windows/action.yml b/.github/actions/setup-windows/action.yml
index d18f124..a68b08b 100644
--- a/.github/actions/setup-windows/action.yml
+++ b/.github/actions/setup-windows/action.yml
@@ -84,10 +84,6 @@
         triplet: x64-windows-release
         token: ${{ github.token }}
         cache-key: ${{ hashFiles('cmake/Modules/*', 'ext/*.cmd', 'ext/*.sh') }}
-        # [svt-av1] Work around Visual Studio 2026 MSVC bug (#52469)
-        # TODO(wtc): Remove this after a vcpkg release newer than 2026.06.01 is
-        # published at https://github.com/microsoft/vcpkg/tags.
-        revision: 'a900048467b8199f82c31411e0f1597c267fdada'
 
     - name: Install nasm
       if: ${{ inputs.codec-aom == 'LOCAL' || inputs.codec-avm == 'LOCAL' || inputs.codec-dav1d == 'LOCAL' || inputs.codec-svt == 'LOCAL' }}