Cleanup: spelling in comments & punctuation

intern/ghost/intern/GHOST_SystemWayland.cc

intern/ghost/intern/GHOST_WindowWayland.cc

release/bin/blender-launcher

scripts/modules/_bpy_internal/freedesktop.py

source/blender/blenkernel/intern/grease_pencil.cc

source/blender/blenkernel/intern/image_gpu.cc

source/blender/blenkernel/intern/pbvh_pixels_copy.cc

source/blender/blenlib/BLI_astar.h

...aw/engines/eevee_next/shaders/eevee_horizon_scan_lib.glsl

source/blender/editors/space_text/text_format_glsl.cc

source/blender/gpu/GPU_texture.hh

source/blender/gpu/intern/gpu_shader_create_info.cc

source/blender/sequencer/intern/sound.cc

source/blender/windowmanager/intern/wm_platform.cc