taskwarrior: bump to 2.6.2 and backport patch for CMake >= 4.0 support #26766

Job	Run time
Test Formalities / Test Formalities	19s
Feeds Package Test Build / Test aarch64_generic	19m 3s
Feeds Package Test Build / Test arm_cortex-a15_neon-vfpv4	18m 9s
Feeds Package Test Build / Test i386_pentium-mmx	18m 4s
Feeds Package Test Build / Test powerpc_464fp	18m 32s
Feeds Package Test Build / Test arm_cortex-a9_vfpv3-d16	18m 36s
Feeds Package Test Build / Test riscv64_generic	18m 47s
Feeds Package Test Build / Test mipsel_24kc	17m 27s
Feeds Package Test Build / Test powerpc_8548	18m 26s
Feeds Package Test Build / Test x86_64	18m 13s
Feeds Package Test Build / Test mips_24kc	18m 36s
	3h 4m 12s

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