Update Dockerfile

Update Docker to latest conan version 2.10.2

Author: ElevationsRPG

build/win32/docker/Dockerfile

@@ -35,7 +35,7 @@ RUN %INSTALLER% /SP- /VERYSILENT /SUPPRESSMSGBOXES /NOCANCEL `
     /NORESTART /CLOSEAPPLICATIONS /RESTARTAPPLICATIONS /LOADINF=git.inf
 
 # download & setup conan
-ARG CONAN_VERSION=2.2.2
+ARG CONAN_VERSION=2.10.2
 ARG CONAN_BINARY=conan-${CONAN_VERSION}-windows-x86_64-installer.exe
 ARG CONAN_URL=https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/${CONAN_BINARY}