Add derive-where to [workspace.dependencies].

Cargo.toml

@@ -62,6 +62,7 @@ exclude = [
 [workspace.dependencies]
 # tidy-alphabetical-start
 bitflags = "2.9.3"
+derive-where = "1.6.0"
 either = "1.15.0"
 indexmap = "2.10.0"
 itertools = "0.12.1"

compiler/rustc_next_trait_solver/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-derive-where = "1.2.7"
+derive-where.workspace = true
 rustc_data_structures = { path = "../rustc_data_structures", optional = true }
 rustc_index = { path = "../rustc_index", default-features = false }
 rustc_macros = { path = "../rustc_macros", optional = true }

compiler/rustc_span/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 blake3 = "1.5.2"
-derive-where = "1.2.7"
+derive-where.workspace = true
 indexmap.workspace = true
 itoa = "1.0"
 md5 = { package = "md-5", version = "0.10.0" }

compiler/rustc_type_ir/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 bitflags.workspace = true
-derive-where = "1.2.7"
+derive-where.workspace = true
 ena = "0.14.3"
 indexmap.workspace = true
 rustc-hash.workspace = true