Bump lukka/get-cmake from 3.27.7 to 3.29.6 #2981

Job	Run time
ci_test_compilers_clang (3.8)	16m 27s
ci_test_compilers_clang2 (13)	12m 21s
ci_test_compilers_clang (3.9)	16m 31s
ci_test_compilers_gcc (6)	16s
ci_test_compilers_gcc2 (12)	19m 13s
ci_test_compilers_clang2 (15-bullseye)	12m 12s
ci_test_compilers_gcc (7)	1s
ci_test_compilers_clang (4)	15m 39s
ci_test_compilers_gcc2 (latest)	19m 20s
ci_test_compilers_gcc (8)	1s
ci_test_compilers_clang (5)	15m 27s
ci_test_compilers_gcc (9)	1s
ci_test_compilers_clang (6)	16m 7s
clang_13_build	39m 56s
ci_test_compilers_gcc (10)	58s
clang_14_build	41m 10s
ci_test_compilers_clang (7)	17m 28s
ci_test_compilers_gcc (11)	53s
ci_test_compilers_clang (8)	18m 35s
ci_test_compilers_gcc (12)	26s
gcc_build	13m 13s
ci_test_compilers_clang (9)	19m 17s
gcc_build_no_deprecated	13m 15s
ci_test_compilers_gcc (latest)	1s
ci_test_compilers_clang (10)	20m 53s
gcc_build11b	1h 11m 18s
ci_test_compilers_clang (11)	21m 5s
gcc_build12	16m 24s
ci_test_compilers_clang (12)	22m 23s
github_20 (g++-12, Debug)	26m 54s
ci_test_compilers_clang (13)	19m 20s
github_20 (g++-12, Release)	26m 29s
ci_test_compilers_clang (14)	19m 42s
github_20 (clang++-14, Debug)	22m 0s
ci_test_compilers_clang (15-bullseye)	18m 19s
github_20 (clang++-14, Release)	22m 0s
	10h 15m 35s

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