chore(10027-cheatcode-mutability-tags): mark contains(string,string) cheatcode as pure

Author: Mouzayan

crates/cheatcodes/assets/cheatcodes.json

@@ -2308,7 +2308,7 @@ interface Vm {
     function indexOf(string calldata input, string calldata key) external pure returns (uint256);
     /// Returns true if `search` is found in `subject`, false otherwise.
     #[cheatcode(group = String)]
-    function contains(string calldata subject, string calldata search) external returns (bool result);
+    function contains(string calldata subject, string calldata search) external pure returns (bool result);
 
     // ======== JSON Parsing and Manipulation ========
 

crates/cheatcodes/spec/src/vm.rs

@@ -32,7 +32,7 @@ From issue [#10027](https://github.com/foundry-rs/foundry/issues/10027):
 
 Mark `pure`:
 
-- [ ] `contains`: `contains(string,string)` _suggested: `pure`_
+- [x] `contains`: `contains(string,string)` _suggested: `pure`_
 
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