Bump @openzeppelin/contracts from 4.7.3 to 4.8.3 in /integration_test…

…s/contracts (#979)

* Bump @openzeppelin/contracts in /integration_tests/contracts

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 4.7.3 to 4.8.3.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.8.3/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts@v4.7.3...v4.8.3)

---
updated-dependencies:
- dependency-name: "@openzeppelin/contracts"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* adjust to 136 cheaper gas

for more info, see OpenZeppelin/openzeppelin-contracts#3513

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mmsqe <mavis@crypto.com>

integration_tests/test_pruned_node.py

@@ -44,7 +44,7 @@ def test_pruned_node(cronos):
     )
     signed = sign_transaction(w3, tx, KEYS["validator"])
     txhash = w3.eth.send_raw_transaction(signed.rawTransaction)
-    exp_gas_used = 51520
+    exp_gas_used = 51384
 
     print("wait for prunning happens")
     wait_for_new_blocks(cronos.cosmos_cli(0), 10)