Bump openssl-sys from 0.9.87 to 0.9.88 in /src/rust (#8984)

Bumps [openssl-sys](https://github.com/sfackler/rust-openssl) from 0.9.87 to 0.9.88.
- [Release notes](https://github.com/sfackler/rust-openssl/releases)
- [Commits](sfackler/rust-openssl@openssl-sys-v0.9.87...openssl-sys-v0.9.88)

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

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

Author: dependabot[bot]

src/rust/Cargo.lock

@@ -17,7 +17,7 @@ cryptography-openssl = { path = "cryptography-openssl" }
 pem = "1.1"
 ouroboros = "0.15"
 openssl = "0.10.52"
-openssl-sys = "0.9.87"
+openssl-sys = "0.9.88"
 foreign-types-shared = "0.1"
 
 [build-dependencies]

src/rust/Cargo.toml

@@ -9,7 +9,7 @@ rust-version = "1.56.0"
 
 [dependencies]
 pyo3 = { version = "0.18", features = ["abi3-py37"] }
-openssl-sys = "0.9.87"
+openssl-sys = "0.9.88"
 
 [build-dependencies]
 cc = "1.0.72"