Fix CI errors

[JosephChotard]

LCOV

It seems that since lcov was upgraded to 2.0 actions have been failing

Last successful linux coverage test:
Unpacking lcov (1.15-1) ...
Now:
Unpacking lcov (2.0-4ubuntu2) ...

geninfo: ERROR: mismatched end line for main at /home/runner/work/h3/h3/src/apps/testapps/testBaseCells.c:23: 32 -> 23
	(use "geninfo --ignore-errors mismatch ..." to bypass this error)

I added --ignore-errors mismatch as that seems to be what people on other issues recommend.

Examples

For the example that was failing CI checks it seems it was due to use-of-uninitialized-value. I initialised the variables and seems to be good now

[JosephChotard]

can't figure out why distance example keeps failing... I'm a C & gh actions noob

[JosephChotard]

2/5 Test #2: distance .........................***Failed 0.22 sec
==9343==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x563864667785 in main (/home/runner/work/h3/h3/build/examples/bin/distance+0xcc785) (BuildId: a9036d3a023b790320c974930802c21cdf8dbfe0)
#1 0x7f513ea2a1c9 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 6d64b17fbac799e68da7ebd9985ddf9b5cb375e6)
#2 0x7f513ea2a28a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 6d64b17fbac799e68da7ebd9985ddf9b5cb375e6)
#3 0x5638645cf3b4 in _start (/home/runner/work/h3/h3/build/examples/bin/distance+0x343b4) (BuildId: a9036d3a023b790320c974930802c21cdf8dbfe0)

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/home/runner/work/h3/h3/build/examples/bin/distance+0xcc785) (BuildId: a9036d3a023b790320c974930802c21cdf8dbfe0) in main
Exiting

[JosephChotard]

@dfellis sorry for spam. Seems like I got it to work on my branch. Could you trigger CI checks?