Bump pem-rfc7468 from 0.7.0 to 1.0.0 (RustPython#6369)

Bumps [pem-rfc7468](https://github.com/RustCrypto/formats) from 0.7.0 to 1.0.0.
- [Commits](RustCrypto/formats@pem-rfc7468/v0.7.0...pem-rfc7468/v1.0.0)

---
updated-dependencies:
- dependency-name: pem-rfc7468
  dependency-version: 1.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Cargo.lock

@@ -125,7 +125,7 @@ rustls-platform-verifier = { version = "0.6", optional = true }
 x509-cert = { version = "0.2.5", features = ["pem", "builder"], optional = true }
 x509-parser = { version = "0.18", optional = true }
 der = { version = "0.7", features = ["alloc", "oid"], optional = true }
-pem-rfc7468 = { version = "0.7", optional = true }
+pem-rfc7468 = { version = "1.0", features = ["alloc"], optional = true }
 webpki-roots = { version = "1.0", optional = true }
 aws-lc-rs = { version = "1.14.1", optional = true }
 oid-registry = { version = "0.7", features = ["x509", "pkcs1", "nist_algs"], optional = true }