update URLs in comments

CONTRIBUTING.md

@@ -56,10 +56,10 @@ You don't have to update existing files' license comments.
 
 ## Implementation details
 
-See the [documents](https://ebiten.org/documents/implementation.html) about internal implementation.
+See the [documents](https://ebitengine.org/en/documents/implementation.html) about internal implementation.
 
 ## Fixing the documentation
 
-Ebitengine's documentations are managed at [ebiten/ebiten.org](https://github.com/ebiten/ebiten.org).  
+Ebitengine's documentations are managed at [ebiten/ebitengine.org](https://github.com/ebitengine/ebitengine.org).
 
-Before submitting a documentation PR, read through the [README](https://github.com/ebiten/ebiten.org/blob/main/README.md) in that repo.
+Before submitting a documentation PR, read through the [README](https://github.com/ebitengine/ebitengine.org/blob/main/README.md) in that repo.

cmd/ebitenmobile/main.go

@@ -14,7 +14,7 @@
 
 // ebitenmobile is a wrapper of gomobile for Ebitengine.
 //
-// For the usage, see https://ebiten.org/documents/mobile.html.
+// For the usage, see https://ebitengine.org/en/documents/mobile.html.
 //
 // gomobile's version is fixed by ebitenmobile.
 // You can specify gomobile's version by EBITENMOBILE_GOMOBILE environment variable.

image.go

@@ -275,7 +275,7 @@ func (i *Image) adjustedRegion() graphicsdriver.Region {
 // Another case is when you use an offscreen as a render source. An offscreen
 // doesn't share the texture atlas with high probability.
 //
-// For more performance tips, see https://ebiten.org/documents/performancetips.html
+// For more performance tips, see https://ebitengine.org/en/documents/performancetips.html
 func (i *Image) DrawImage(img *Image, options *DrawImageOptions) {
 	i.copyCheck()
 
@@ -524,7 +524,7 @@ func init() {
 //
 // Vertex contains color values, which can be interpreted for any purpose by the shader.
 //
-// For the details about the shader, see https://ebiten.org/documents/shader.html.
+// For the details about the shader, see https://ebitengine.org/en/documents/shader.html.
 //
 // If len(indices) is not multiple of 3, DrawTrianglesShader panics.
 //
@@ -658,7 +658,7 @@ func init() {
 
 // DrawRectShader draws a rectangle with the specified width and height with the specified shader.
 //
-// For the details about the shader, see https://ebiten.org/documents/shader.html.
+// For the details about the shader, see https://ebitengine.org/en/documents/shader.html.
 //
 // When one of the specified image is non-nil and is disposed, DrawRectShader panics.
 //

mobile/mobile.go

@@ -16,7 +16,7 @@
 //
 // This package is used when you use `ebitenmobile bind`.
 //
-// For usage, see https://ebiten.org/documents/mobile.html.
+// For usage, see https://ebitengine.org/en/documents/mobile.html.
 package mobile
 
 import (

shader.go

@@ -21,7 +21,7 @@ import (
 
 // Shader represents a compiled shader program.
 //
-// For the details about the shader, see https://ebiten.org/documents/shader.html.
+// For the details about the shader, see https://ebitengine.org/en/documents/shader.html.
 type Shader struct {
 	shader *ui.Shader
 }
@@ -30,7 +30,7 @@ type Shader struct {
 //
 // If the compilation fails, NewShader returns an error.
 //
-// For the details about the shader, see https://ebiten.org/documents/shader.html.
+// For the details about the shader, see https://ebitengine.org/en/documents/shader.html.
 func NewShader(src []byte) (*Shader, error) {
 	ir, err := graphics.CompileShader(src)
 	if err != nil {