Bump rsa in /sync-server in the cargo group across 1 directory

Bumps the cargo group with 1 update in the /sync-server directory: [rsa](https://github.com/RustCrypto/RSA).


Updates `rsa` from 0.9.7 to 0.9.10
- [Changelog](https://github.com/RustCrypto/RSA/blob/v0.9.10/CHANGELOG.md)
- [Commits](https://github.com/RustCrypto/RSA/compare/v0.9.7...v0.9.10)

---
updated-dependencies:
- dependency-name: rsa
  dependency-version: 0.9.10
  dependency-type: indirect
  dependency-group: cargo
...

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

sync-server/Cargo.lock

@@ -1320,11 +1320,10 @@ dependencies = [
 
 [[package]]
 name = "num-bigint-dig"
-version = "0.8.4"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc84195820f291c7697304f3cbdadd1cb7199c0efc917ff5eafd71225c136151"
+checksum = "e661dda6640fad38e827a6d4a310ff4763082116fe217f279885c97f511bb0b7"
 dependencies = [
- "byteorder",
  "lazy_static",
  "libm",
  "num-integer",
@@ -1630,9 +1629,9 @@ checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
 name = "rsa"
-version = "0.9.7"
+version = "0.9.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47c75d7c5c6b673e58bf54d8544a9f432e3a925b0e80f7cd3602ab5c50c55519"
+checksum = "b8573f03f5883dcaebdfcf4725caa1ecb9c15b2ef50c43a07b816e06799bb12d"
 dependencies = [
  "const-oid",
  "digest",