Update guidance about major version of edge releases.

Signed-off-by: Flynn <[email protected]>

linkerd.io/content/2.15/tasks/upgrade.md

@@ -106,16 +106,10 @@ the version-specific upgrade notes before proceeding.
 ### Edge releases
 
 For edge releases, it is also usually safe to upgrade one major version at a
-time. The "major version" of an edge release is indicated by the most recent
-`version-2.X` tag before the edge release tag in question; this is also
-included in the release notes for each edge release.
-
-For example, `edge-24.4.1` is within major version 2.15: the most recent
-`version-2.X` tag before `edge-24.4.1` is
-[`version-2.15`](https://github.com/linkerd/linkerd2/releases/tag/version-2.15),
-which corresponds to `edge-24.2.4`. Therefore, it should be safe to upgrade
-from `edge-24.2.4` to any edge release within 2.15 or 2.16, but not to any
-edge release produced after `version-2.17` is tagged.
+time. The major version of an edge release is included in the release notes
+for each edge release: for example, `edge-24.4.1` is part of Linkerd 2.15, so
+it should be safe to upgrade from `edge-24.2.4` to any edge release within
+Linkerd 2.15 or Linkerd 2.16.
 
 For any situation where this is not the case, the edge release guidance will
 have more information.

linkerd.io/content/releases/_index.md

@@ -54,6 +54,14 @@ digits of the year, `m` is the numeric month, and `n` is numeric edge release
 count for that month. For example, `edge-24.1.3` is the third edge release
 shipped in January 2024.
 
+Each edge release is also part of a specific major version of Linkerd. The
+major version of an edge release is indicated by the most recent `version-2.X`
+tag before the edge release tag in question; this is also included in the
+release notes for each edge release. For example, `edge-24.4.1` is part of
+Linkerd 2.15: the most recent `version-2.X` tag before `edge-24.4.1` is
+[`version-2.15`](https://github.com/linkerd/linkerd2/releases/tag/version-2.15),
+which corresponds to `edge-24.2.4`.
+
 Using edge release artifacts and reporting bugs helps us ensure a rapid pace of
 development and is a great way to help Linkerd. We publish edge release guidance
 as part of the release notes and strive to always provide production-ready