Move Graceful Stack Upgrades

Implemented with #237

README.md

@@ -13,7 +13,6 @@
 * [0044: Provide Global Mechanism to Disable SBOM Generation](./text/0044-disable-sbom.md)
 * [0045: Secure runtime environments](./text/0045-user-ids.md)
 * [0046: Define an Image & Dependency Retention Policy for Paketo Images](./text/0046-image-retention-policy.md) ([tracking issue](https://github.com/paketo-buildpacks/rfcs/issues/189))
-* [0052: Graceful Stack Upgrades](./text/0052-graceful-stack-upgrades.md)
 * [0054: Paketo Steering Committee Elections](./text/0054-steering-committee-elections.md) ([tracking issue](https://github.com/paketo-buildpacks/rfcs/issues/283))
 * [0055: Create Language Family Builders](./text/0055-create-language-family-builders.md) ([tracking issue](https://github.com/paketo-buildpacks/rfcs/issues/281))
 * [0056: Stacks & Extensions for UBI base images. (UBI8)](./text/0056-ubi-based-stacks.md)
@@ -57,6 +56,7 @@
 * [0048: Additional Github Issue Templates](./text/0048-issue-templates.md)
 * [0050: Rename Buildpacks](./text/0050-buildpack-rename.md)
 * [0051: Contribute APM Tools Buildpacks](./text/0051-apm-tools.md)
+* [0052: Graceful Stack Upgrades](./text/0052-graceful-stack-upgrades.md)
 * [0053: Create static stack](./text/0053-add-static-stack.md)
 
 ## Superseded RFCs