Fix: Declare correct RAM sizes for STM32F7 #3029

Job	Run time
build-macos (macos-13)	51s
build-mingw (windows-2022, mingw64)	1m 55s
build-macos (macos-13, gcc@11)	1m 32s
build-macos (macos-14)	21s
build-mingw (windows-2022, ucrt64)	2m 2s
build-macos (macos-13, gcc@12)	57s
build-macos (macos-latest)	23s
build-mingw (windows-2022, clang64)	2m 20s
build-linux (jammy, 96b_carbon)	39s
build-macos (macos-13, gcc@13)	1m 6s
build-linux (jammy, blackpill-f401cc)	34s
build-macos (macos-13, gcc@14)	1m 26s
build-msvc (meson, windows-2022)	1m 16s
build-linux (jammy, blackpill-f401ce)	41s
size-diff	41s
build-macos (macos-14, gcc@11)	59s
build-linux (jammy, blackpill-f411ce)	39s
build-macos (macos-14, gcc@12)	48s
build-linux (jammy, bluepill)	38s
build-macos (macos-14, gcc@13)	39s
build-linux (jammy, ctxlink)	42s
build-linux (jammy, f072)	54s
build-macos (macos-14, gcc@14)	36s
build-linux (jammy, f3)	1m 18s
build-linux (jammy, f4discovery)	1m 2s
build-linux (jammy, hydrabus)	1m 19s
build-linux (jammy, launchpad-icdi)	38s
build-linux (jammy, native)	40s
build-linux (jammy, native-uncommon)	35s
build-linux (jammy, native-st-clones)	40s
build-linux (jammy, native-riscv)	59s
build-linux (jammy, native-remote)	31s
build-linux (jammy, stlink)	36s
build-linux (jammy, stlinkv3)	35s
build-linux (jammy, swlink)	33s
	32m 5s

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