Bump syn from 1.0.87 to 1.0.88 (#5118)

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.87 to 1.0.88.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.87...1.0.88)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

polkadot/Cargo.lock

@@ -11025,9 +11025,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.87"
+version = "1.0.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e59d925cf59d8151f25a3bedf97c9c157597c9df7324d32d68991cc399ed08b"
+checksum = "ebd69e719f31e88618baa1eaa6ee2de5c9a1c004f1e9ecdb58e8352a13f20a01"
 dependencies = [
  "proc-macro2",
  "quote",

polkadot/node/gum/proc-macro/Cargo.toml

@@ -12,7 +12,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.86", features = ["full", "extra-traits"] }
+syn = { version = "1.0.88", features = ["full", "extra-traits"] }
 quote = "1.0.15"
 proc-macro2 = "1.0.36"
 proc-macro-crate = "1.1.3"

polkadot/node/overseer/overseer-gen/proc-macro/Cargo.toml

@@ -12,7 +12,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.87", features = ["full", "extra-traits"] }
+syn = { version = "1.0.88", features = ["full", "extra-traits"] }
 quote = "1.0.15"
 proc-macro2 = "1.0.36"
 proc-macro-crate = "1.1.3"

polkadot/xcm/procedural/Cargo.toml

@@ -10,5 +10,5 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.36"
 quote = "1.0.15"
-syn = "1.0.87"
+syn = "1.0.88"
 Inflector = "0.11.4"