Adapt to minijinja 2.21, bump minijinja-contrib in lockstep

The 2.21 AST grew a dedicated Compare node for chained comparisons,
which the i18n scanner needs to walk. Also raise the workspace
requirements from 2.15.1/2.12.0 to 2.21.0.

Cargo.lock

@@ -3941,9 +3941,9 @@ dependencies = [
 
 [[package]]
 name = "minijinja-contrib"
-version = "2.12.0"
+version = "2.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "182ba1438db4679ddfa03792c183bdc2b9ce26b58e7d41a749e59b06497cf136"
+checksum = "85342f6fac0be8ccd5bd00d9066be538f34f393f577b75d81b17c8398a6b43bb"
 dependencies = [
  "minijinja",
  "serde",

Cargo.toml

@@ -383,12 +383,12 @@ version = "0.3.17"
 
 # Templates
 [workspace.dependencies.minijinja]
-version = "2.15.1"
+version = "2.21.0"
 features = ["urlencode", "loader", "json", "speedups", "unstable_machinery"]
 
 # Additional filters for minijinja
 [workspace.dependencies.minijinja-contrib]
-version = "2.12.0"
+version = "2.21.0"
 features = ["pycompat"]
 
 # Utilities to deal with non-zero values

crates/i18n-scan/src/minijinja.rs

@@ -1,3 +1,4 @@
+// Copyright 2026 Element Creations Ltd.
 // Copyright 2024, 2025 New Vector Ltd.
 // Copyright 2023, 2024 The Matrix.org Foundation C.I.C.
 //
@@ -196,6 +197,12 @@ fn find_in_expr<'a>(context: &mut Context, expr: &'a Expr<'a>) -> Result<(), min
             find_in_expr(context, &bin_op.left)?;
             find_in_expr(context, &bin_op.right)?;
         }
+        Expr::Compare(compare) => {
+            find_in_expr(context, &compare.expr)?;
+            for op in &compare.ops {
+                find_in_expr(context, &op.expr)?;
+            }
+        }
         Expr::IfExpr(if_expr) => {
             find_in_expr(context, &if_expr.test_expr)?;
             find_in_expr(context, &if_expr.true_expr)?;