Bump serde from 1.0.103 to 1.0.104

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.103 to 1.0.104.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.103...v1.0.104)

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

programs/bpf_loader/Cargo.toml

@@ -13,7 +13,7 @@ bincode = "1.2.1"
 byteorder = "1.3.2"
 libc = "0.2.66"
 log = "0.4.8"
-serde = "1.0.103"
+serde = "1.0.104"
 solana-logger = { path = "../../logger", version = "0.22.0" }
 solana-sdk = { path = "../../sdk", version = "0.22.0" }
 solana_rbpf = "=0.1.19"