chore(simple-rest): add changeset for query-string to qs migration (#7601)

Author: MedhirAryan03

.changeset/fix-simple-rest-vulnerable-dep.md

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+---
+"@refinedev/simple-rest": patch
+---
+
+fix(simple-rest): issue with vulnerable `decode-uri-component` dependency. #7601
+
+We had a vulnerability (GHSA-vcc3-ghjq-m6fr / CVE-2026-45822) where `@refinedev/simple-rest` pulled in `decode-uri-component@<0.5.0` via `query-string@7`. Replaced `query-string` with `qs` to eliminate the security vulnerability while preserving full CommonJS (CJS) and ESM dual module compatibility.
+
+Fixes #7601