Fix section headers for TF 2.10.0 release notes

PiperOrigin-RevId: 449292390
diff --git a/RELEASE.md b/RELEASE.md
index 42c1dc4..903a679 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -2,7 +2,7 @@
 
 <INSERT SMALL BLURB ABOUT RELEASE FOCUS AREA AND POTENTIAL TOOLCHAIN CHANGES>
 
-# Breaking Changes
+## Breaking Changes
 
 *   <DOCUMENT BREAKING CHANGES HERE>
 *   <THIS SECTION SHOULD CONTAIN API, ABI AND BEHAVIORAL BREAKING CHANGES>
@@ -11,13 +11,13 @@
     update your imports accordingly, the old files will be removed in Release
     2.11.
 
-# Known Caveats
+## Known Caveats
 
 *   <CAVEATS REGARDING THE RELEASE (BUT NOT BREAKING CHANGES).>
 *   <ADDING/BUMPING DEPENDENCIES SHOULD GO HERE>
 *   <KNOWN LACK OF SUPPORT ON SOME PLATFORM, SHOULD GO HERE>
 
-# Major Features and Improvements
+## Major Features and Improvements
 
 *   `tf.lite`:
     *   New operations supported:
@@ -68,7 +68,7 @@
         not warnings will be printed when operations in the provided `fn` fall
         back to a while loop.
 
-# Bug Fixes and Other Changes
+## Bug Fixes and Other Changes
 
 *   `tf.keras`:
 
@@ -89,7 +89,7 @@
     * Added `tf.random.experimental.stateless_shuffle`, a stateless version of
       `tf.random.shuffle`.
 
-# Thanks to our Contributors
+## Thanks to our Contributors
 
 This release contains contributions from many people at Google, as well as: