jammy-amd64-tf-a-build-next: update to CMake v3.20.0 for RMM build

Aligns the CMake version with the one used in the
`jammy-amd64-tf-a-build` Docker image. This image is a
staging fork intended for testing purposes.

Change-Id: I10877b181c4893c0741e46e432284713bfb7ca8b
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
diff --git a/jammy-amd64-tf-a-build-next/tf-dependencies.install b/jammy-amd64-tf-a-build-next/tf-dependencies.install
index bdc9e6e..6ee4590 100644
--- a/jammy-amd64-tf-a-build-next/tf-dependencies.install
+++ b/jammy-amd64-tf-a-build-next/tf-dependencies.install
@@ -18,7 +18,7 @@
 
 # Install CMake
 curl --connect-timeout 5 --retry 5 --create-dirs -fsSLo /tmp/cmake-Linux-x86_64.tar.gz \
-  https://github.com/Kitware/CMake/releases/download/v3.15.7/cmake-3.15.7-Linux-x86_64.tar.gz
+  https://github.com/Kitware/CMake/releases/download/v3.20.0/cmake-3.20.0-Linux-x86_64.tar.gz
 tar -xf /tmp/cmake-Linux-x86_64.tar.gz -C ${TOOLS_DIR} --strip-components=1
 
 # Install Arm GCC toolchain (arm-none-eabi GNU-A)