Auto merge of #14753 - epage:resoler-prep, r=ehuss

docs(resolver): Further v3 prep

### What does this PR try to resolve?

This is a follow up to #14725

### How should we test and review this PR?

### Additional information

src/doc/src/reference/resolver.md

@@ -503,7 +503,7 @@ name = "my-package"
 version = "1.0.0"
 resolver = "2"
 ```
-- `"1"` (workspace, [`edition = "2015"`](manifest.md#the-edition-field) default)
+- `"1"` (default)
 - `"2"` ([`edition = "2021"`](manifest.md#the-edition-field) default): Introduces changes in [feature
 unification](#features). See the [features chapter][features-2] for more
 details.
@@ -519,6 +519,8 @@ members = ["member1", "member2"]
 resolver = "2"
 ```
 
+> **MSRV:** Requires 1.51+
+
 [virtual workspace]: workspaces.md#virtual-workspace
 [features-2]: features.md#feature-resolver-version-2