Fix typos with codespell

Using codespell 1.15.0.

Method:
```
$ cat > ../godot-word-whitelist.txt << EOF
ang
curvelinear
doubleclick
leapyear
lod
merchantibility
nd
numer
ois
ony
que
seeked
synching
te
uint
unselect
webp
EOF

$ codespell -w -q 3 -I ../godot-word-whitelist.txt --skip="./thirdparty,*.po"
$ git diff // undo unwanted changes
```

1 files changed, 1 insertions, 1 deletions

diff --git a/servers/audio/effects/audio_effect_spectrum_analyzer.cpp b/servers/audio/effects/audio_effect_spectrum_analyzer.cpp
index 46d92336f3..05cba416be 100644
--- a/servers/audio/effects/audio_effect_spectrum_analyzer.cpp
+++ b/servers/audio/effects/audio_effect_spectrum_analyzer.cpp
@@ -112,7 +112,7 @@ void AudioEffectSpectrumAnalyzerInstance::process(const AudioFrame *p_src_frames
 	}
 
 	//determine time of capture
-	double remainer_sec = (temporal_fft_pos / mix_rate); //substract remainder from mix time
+	double remainer_sec = (temporal_fft_pos / mix_rate); //subtract remainder from mix time
 	last_fft_time = time - uint64_t(remainer_sec * 1000000.0);
 }