refactor: use inline insta snapshots for multiline table tests

Replace external .snap files with inline snapshot strings for the
two multiline inline table insertion tests.

https://claude.ai/code/session_01FT59TTz4yRy3DPwbREE82u

Author: claude

crates/pixi_manifest/src/toml/document.rs

@@ -445,7 +445,16 @@ dependencies = {
             )
             .unwrap();
 
-        insta::assert_snapshot!(manifest.0.to_string());
+        insta::assert_snapshot!(manifest.0.to_string(), @r#"
+
+        [envs.python]
+        channels = ["dummy-channel"]
+        dependencies = {
+            dummy = "3.11.*",
+            other = "1.0",
+            new-pkg = "2.0",
+        }
+        "#);
     }
 
     /// Tests inserting into a multiline inline table where the last element
@@ -469,6 +478,15 @@ dependencies = {
             )
             .unwrap();
 
-        insta::assert_snapshot!(manifest.0.to_string());
+        insta::assert_snapshot!(manifest.0.to_string(), @r#"
+
+        [envs.python]
+        channels = ["dummy-channel"]
+        dependencies = {
+            dummy = "3.11.*",
+            other = "1.0",
+            new-pkg = "2.0"
+        }
+        "#);
     }
 }