RELEASE_NOTES: formatting cleanup, add some urls

No-Try: true
Change-Id: Ic8f8416fa10d37205ab27a8e8da173869d158ab1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235862
Reviewed-by: Heather Miller <hcm@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index cf34d8b..a3703ba 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -7,37 +7,59 @@
 Milestone 78
 
   * Added RELEASE_NOTES.txt file
+    https://review.skia.org/229760
 
   * SkDrawLooper is no longer supported in SkPaint or SkCanvas.
+    https://review.skia.org/230579
+    https://review.skia.org/231736
 
-  * SkPath::Iter::next() now ignores its consumDegenerates bools. Those will so go away entirely
+  * SkPath::Iter::next() now ignores its consumDegenerates bools. Those will so
+    go away entirely
+    https://review.skia.org/235104
 
   * SkImage: new factories: DecodeToRaster, DecodeToTexture
+    https://review.skia.org/234476
 
   * SkImageFilter API refactor started:
     - Provide new factory API in include/effects/SkImageFilters
     - Consolidated enum types to use SkTileMode and SkColorChannel
     - Hide filter implementation classes
-    - Hide previously public functions on SkImageFilter that were intended for internal use only
+    - Hide previously public functions on SkImageFilter that were intended for
+      internal use only
+    https://review.skia.org/230198
+    https://review.skia.org/230876
+    https://review.skia.org/231256
 
-  * SkColorFilters::HSLAMatrix - new matrix color filter operating in HSLA space.
+  * SkColorFilters::HSLAMatrix - new matrix color filter operating in HSLA
+    space.
+    https://review.skia.org/231736
 
-  * Modify GrBackendFormat getters to not return internal pointers. Use an enum class for GL formats.
+  * Modify GrBackendFormat getters to not return internal pointers. Use an enum
+    class for GL formats.
+    https://review.skia.org/233160
 
   * Expose GrContext::dump() when SK_ENABLE_DUMP_GPU is defined.
+    https://review.skia.org/233557
 
-  * Vulkan backend now supports YCbCr sampler for I420 Vulkan images that are not
-    backed by external images.
+  * Vulkan backend now supports YCbCr sampler for I420 Vulkan images that are
+    not backed by external images.
+    https://review.skia.org/233776
 
-  * Add SkCodec::SelectionPolicy for distinguishing between decoding a still image
-    or an image sequence for a container format that has both (e.g. HEIF).
+  * Add SkCodec::SelectionPolicy for distinguishing between decoding a still
+    image or an image sequence for a container format that has both (e.g. HEIF).
+    https://review.skia.org/232839
 
-  * SkImage::makeTextureImage and SkImage::MakeCrossContextFromPixmap no longer take an
-    SkColorSpace parameter. It was unused.
+  * SkImage::makeTextureImage and SkImage::MakeCrossContextFromPixmap no longer
+    take an SkColorSpace parameter. It was unused.
+    https://review.skia.org/234579
+    https://review.skia.org/234912
 
-  * SkImage::reinterpretColorSpace - to reinterpret image contents in a new color space.
+  * SkImage::reinterpretColorSpace - to reinterpret image contents in a new
+    color space.
+    https://review.skia.org/234328
 
   * Removed SkImage::MakeCrossContextFromEncoded.
+    https://review.skia.org/234912
 
   * SkMallocPixelRef: remove MakeDirect and MakeWithProc from API.
     https://review.skia.org/234660