Data: fix various typos

Found via `codespell -q 3 -S "./Externals,./Data/Sys/wiitdb-??.txt,*.po,*.pot" -L andf,asnd,bootup,brocken,bufferin,clen,collet,datas,delt,diety,extint,fpr,inout,inport,interm,nd,nin,ontop,pixelx,re-use,re-used,sav,stateman,strat,transer,wil`

Data/Sys/Shaders/PerceptualHDR.glsl

@@ -106,14 +106,14 @@ void main()
     // scaling while also being able to use the luminance channel.
     float4 ictcp_color = LinearRGBToICtCP(color);
 
-    // Scale the color in perceptual space depending on the percieved luminance.
+    // Scale the color in perceptual space depending on the perceived luminance.
     //
     // At low luminances, ~0.0, pow(AMPLIFICATION, ~0.0) ~= 1.0, so the
     // color will appear to be unchanged. This is important as we don't want to
     // over expose dark colors which would not have otherwise been seen.
     //
     // At high luminances, ~1.0, pow(AMPLIFICATION, ~1.0) ~= AMPLIFICATION,
-    // which is equivilant to scaling the color by AMPLIFICATION. This is
+    // which is equivalent to scaling the color by AMPLIFICATION. This is
     // important as we want to get the most out of the display, and we want to
     // get bright colors to hit their target brightness.
     //

Data/Sys/Shaders/asciiart.glsl

@@ -391,7 +391,7 @@ bool supportsSIMD(uint simd_width)
 #endif
 }
 
-// "Error: The AsciiArt shader requires the missing GPU extention KHR_shader_subgroup."
+// "Error: The AsciiArt shader requires the missing GPU extension KHR_shader_subgroup."
 const uint missing_subgroup_warning_len = 82;
 const uint missing_subgroup_warning[missing_subgroup_warning_len] = {
     37, 82, 82, 79, 82, 26, 95, 52, 72, 69, 95, 33, 83, 67, 73, 73, 33, 82, 84, 95, 83,

Data/Sys/Shaders/default_pre_post_process.glsl

@@ -353,7 +353,7 @@ void main()
 		// Doing linear sampling in "gamma space" on linear texture formats isn't correct.
 		// If the source and target resolutions don't match, the GPU will return a color
 		// that is the average of 4 gamma space colors, but gamma space colors can't be blended together,
-		// gamma neeeds to be de-applied first. This makes a big difference if colors change
+		// gamma needs to be de-applied first. This makes a big difference if colors change
 		// drastically between two pixels.
 
 		color = LinearGammaCorrectedSample(game_gamma);

Data/Sys/Shaders/nightvision2.glsl

@@ -40,7 +40,7 @@ void main()
 
 	/*****inline square root routines*****/
 	// bit of a performance bottleneck.
-	// neccessary to make the darkened area rounded
+	// necessary to make the darkened area rounded
 	// instead of rhombus-shaped.
 	float sqrt = x / 10.0;
 

Data/Sys/Shaders/nightvision2scanlines.glsl

@@ -50,7 +50,7 @@ void main()
 
 	//****inline square root routines*****/
 	// bit of a performance bottleneck.
-	// neccessary to make the darkened area rounded
+	// necessary to make the darkened area rounded
 	// instead of rhombus-shaped.
 	float sqrt = x / 10.0;
 	while ((sqrt*sqrt) < x)