fix(protocol): sync submodule commits (#15656)

.gitmodules

@@ -1,23 +1,27 @@
-[submodule "packages/protocol/lib/solmate"]
-	path = packages/protocol/lib/solmate
-	url = https://github.com/rari-capital/solmate
-	branch = v1.5.0
+# We shall favor using specific git tags or commit hashes to ensure code stability;
+# Try to avoid depending on branches whose code may change unexpectedly.
+
 [submodule "packages/protocol/lib/openzeppelin-contracts-upgradeable"]
 	path = packages/protocol/lib/openzeppelin-contracts-upgradeable
 	url = https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable
-	branch = v4.8.2
+	tag = v4.8.2
+
 [submodule "packages/protocol/lib/openzeppelin-contracts"]
 	path = packages/protocol/lib/openzeppelin-contracts
 	url = https://github.com/OpenZeppelin/openzeppelin-contracts
-	branch = v4.8.2
+	tag = v4.8.2
+
 [submodule "packages/protocol/lib/forge-std"]
 	path = packages/protocol/lib/forge-std
 	url = https://github.com/foundry-rs/forge-std
-	branch = chore/v1.5.1
+	tag = v1.5.1
+
 [submodule "packages/protocol/lib/solady"]
 	path = packages/protocol/lib/solady
 	url = https://github.com/Vectorized/solady
+	tag = v0.0.167
+
 [submodule "packages/protocol/lib/p256-verifier"]
 	path = packages/protocol/lib/p256-verifier
 	url = https://github.com/taikoxyz/p256-verifier
-	branch = use_at_taiko
+	branch = use_at_taiko # a protected branch maintained by Taiko.