Add compatibility notice after #78266 #7947

Job	Run time
📊 Static checks / Code style, file formatting, and docs	38s
🍏 iOS / Template (target=template_release)	13m 34s
🤖 Android / Template (target=template_release)	19m 39s
🌐 Web / Template (target=template_release)	13m 24s
🏁 Windows / Editor (target=editor, tests=yes)	45m 28s
🏁 Windows / Template (target=template_release)	30m 12s
🐧 Linux / Editor w/ Mono (target=editor)	35m 41s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	34m 21s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	34m 7s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	23m 32s
🐧 Linux / Template w/ Mono (target=template_release)	20m 27s
🐧 Linux / Minimal template (target=template_release, everything disabled)	16m 12s
🍎 macOS / Editor (target=editor, tests=yes)	29m 12s
🍎 macOS / Template (target=template_release)	6m 8s
🪲 Godot CPP / Build and test Godot CPP	13m 23s
	5h 35m 58s

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