Fix typos with codespell

Using codespell 1.14.0.

Method:
```
$ cat > ../godot-word-whitelist.txt << EOF
ang
doubleclick
lod
nd
numer
que
te
unselect
EOF
$ codespell -w -q 3 -I ../godot-word-whitelist.txt --skip="./thirdparty,*.po"
$ git diff // undo unwanted changes
```

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gles3/shader_compiler_gles3.cpp b/drivers/gles3/shader_compiler_gles3.cpp
index da54f7a2af..ad26294527 100644
--- a/drivers/gles3/shader_compiler_gles3.cpp
+++ b/drivers/gles3/shader_compiler_gles3.cpp
@@ -167,7 +167,7 @@ static String _opstr(SL::Operator p_op) {
 static String _mkid(const String &p_id) {
 
 	String id = "m_" + p_id;
-	return id.replace("__", "_dus_"); //doubleunderscore is reserverd in glsl
+	return id.replace("__", "_dus_"); //doubleunderscore is reserved in glsl
 }
 
 static String f2sp0(float p_float) {
diff --git a/drivers/gles3/shaders/tonemap.glsl b/drivers/gles3/shaders/tonemap.glsl
index 80ad003c80..626968bc05 100644
--- a/drivers/gles3/shaders/tonemap.glsl
+++ b/drivers/gles3/shaders/tonemap.glsl
@@ -124,7 +124,7 @@ vec4 texture2D_bicubic(sampler2D tex, vec2 uv, int p_lod) {
 #endif
 
 vec3 tonemap_filmic(vec3 color, float white) {
-	// exposure bias: input scale (color *= bias, white *= bias) to make the brighness consistent with other tonemappers
+	// exposure bias: input scale (color *= bias, white *= bias) to make the brightness consistent with other tonemappers
 	// also useful to scale the input to the range that the tonemapper is designed for (some require very high input values)
 	// has no effect on the curve's general shape or visual properties
 	const float exposure_bias = 2.0f;