Update issue templates

add specific issue for stb_image incorrect load

.github/ISSUE_TEMPLATE/stb_image-doesn-t-load-specific-image-correctly.md

@@ -0,0 +1,15 @@
+---
+name: stb_image Doesn't Load Specific Image Correctly
+about: if an image displays wrong in your program, and you've verified stb_image is
+  the problem
+title: ''
+labels: 1 stb_image
+assignees: ''
+
+---
+
+1. **Confirm that, after loading the image with stbi_load, you've immediately written it out with stbi_write_png or similar, and that version of the image is wrong.** If it displays wrong in a program you're writing, it could be your display code. For example, people writing OpenGL programs frequently do not upload or display the image correctly and blame stb_image for it.
+
+2. *Provide an image that does not load correctly using stb_image* so we can reproduce the problem.
+
+3. *Provide an image or description of what part of the image is incorrect and how* so we can be sure we've reproduced the problem correctly.