Bump vcpkg

windows-1809/base/Dockerfile

@@ -48,6 +48,6 @@ RUN [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tl
 RUN $vcpkg_dir = 'C:/vcpkg'; \
     git clone -b robofish --single-branch https://git.imp.fu-berlin.de/bioroboticslab/robofish/vcpkg.git; \
     cd $vcpkg_dir; \
-    git checkout 6cede0254f5a3b8cd464494c65a5658dc4e5db1e; \
+    git checkout d61d47c5cac2198bf0262d75742e8a4a38e573d6; \
     ./scripts/bootstrap.ps1; \
     [Environment]::SetEnvironmentVariable('VCPKG_DIR', "\"$vcpkg_dir\"", [EnvironmentVariableTarget]::Machine);