update ci.yml to test Nim 2.2; also test gcc-14

[narimiran]

No description provided.

[tersec]

nim-lang/Nim#24159

[tersec]

It's trying to generate x86 assembly for the arm64 target:

[NimScript] exec: nim c  --styleCheck:usages --styleCheck:error --verbosity:0 --hints:off --skipParentCfg --skipUserCfg --outdir:build --nimcache:build/nimcache -f --stacktrace:on --linetrace:on --threads:on   --mm:refc -r benchmarks/dfs/taskpool_dfs.nim
/Users/runner/work/nim-taskpools/nim-taskpools/taskpools/event_notifiers.nim(56, 1) Warning: Overriding `=` hook is deprecated; Override `=copy` hook instead [Deprecated]
/Users/runner/work/nim-taskpools/nim-taskpools/taskpools/taskpools.nim(115, 3) template/generic instantiation of `preCondition` from here
/Users/runner/work/nim-taskpools/nim-taskpools/taskpools/instrumentation/contracts.nim(84, 19) Warning: use `uint`; ByteAddress is deprecated [Deprecated]
In file included from /Users/runner/work/nim-taskpools/nim-taskpools/build/nimcache/@mtaskpool_dfs.nim.c:11:
/Users/runner/work/nim-taskpools/nim-taskpools/benchmarks/wtime.h:36:26: error: invalid output constraint '=a' in asm
        asm volatile ("rdtsc" : "=a" (lo), "=d" (hi));
                                ^
1 error generated.