build: pin -std=c11 for instrument-hooks core.c #853

Job	Run time
check (codspeedhq-arm64-ubuntu-22.04)	1m 15s
List examples	5s
check (ubuntu-latest)	1m 23s
with-electron-and-walltime on Node 18	1m 49s
with-typescript-simple-esm on Node 18	2m 22s
with-typescript-esm on Node 20.5.1	2m 26s
with-electron-and-walltime on Node 20.5.1	1m 42s
with-typescript-cjs on Node 20.5.1	6m 18s
with-vitest-v3 on Node 18	1m 53s
with-tinybench-v6 on Node 20.5.1	2m 4s
with-typescript-simple-cjs on Node 18	2m 19s
with-tinybench-v5 on Node 20.5.1	2m 21s
with-typescript-simple-esm on Node 20.5.1	2m 53s
with-javascript-esm on Node 18	2m 17s
with-javascript-esm on Node 20.5.1	2m 16s
with-typescript-esm on Node 18	2m 46s
with-vitest-v3 on Node 20.5.1	2m 7s
with-typescript-cjs on Node 18	2m 26s
with-typescript-simple-cjs on Node 20.5.1	2m 33s
	43m 15s

Provide feedback