docs: adding the link for the new hip

Signed-off-by: Andrew Shoell <mrlunchbox777@gmail.com>

Author: mrlunchbox777

hips/README.md

@@ -37,3 +37,4 @@ restricted markdown format and can be found in the
 - [hip-0025: Better Support for Resource Creation Sequencing](hip-0025.md)
 - [hip-0026: H4HIP: Wasm plugin system](hip-0026.md)
 - [hip-0027: Bring .helmignore to parity with .gitignore file targeting syntax](hip-0027.md)
+- [hip-0029: Expose Release History During Template Rendering](hip-0029.md)