update NEWS for 1.5 release #16

Job	Run time
test (x86, linux/386, gcc)	17s
test (x86, linux/386, clang)	23s
test (aarch64, linux/arm64, gcc)	34s
test (x86_64, linux/amd64, clang)	21s
test (arm, linux/arm/v7, gcc)	34s
test (ppc64le, linux/ppc64le, clang)	1m 2s
test (s390x, linux/s390x, gcc)	46s
test (x86_64, linux/amd64, gcc)	15s
test (loongarch64, linux/loong64, gcc)	50s
test (s390x, linux/s390x, clang)	1m 24s
test (riscv64, linux/riscv64, clang)	59s
test (ppc64le, linux/ppc64le, gcc)	34s
test (aarch64, linux/arm64, clang)	53s
test (arm, linux/arm/v7, clang)	58s
test (loongarch64, linux/loong64, clang)	1m 29s
test (riscv64, linux/riscv64, gcc)	1m 2s
	12m 21s

Provide feedback