Bump pem from 1.0.1 to 1.0.2 in /src/rust (#6784)

Bumps [pem](https://github.com/jcreekmore/pem-rs) from 1.0.1 to 1.0.2.
- [Release notes](https://github.com/jcreekmore/pem-rs/releases)
- [Changelog](https://github.com/jcreekmore/pem-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jcreekmore/pem-rs/compare/v1.0.1...v1.0.2)

---
updated-dependencies:
- dependency-name: pem
  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>

src/rust/Cargo.lock

@@ -231,13 +231,11 @@ dependencies = [
 
 [[package]]
 name = "pem"
-version = "1.0.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06673860db84d02a63942fa69cd9543f2624a5df3aea7f33173048fa7ad5cf1a"
+checksum = "e9a3b09a20e374558580a4914d3b7d89bd61b954a5a5e1dcbea98753addb1947"
 dependencies = [
  "base64",
- "once_cell",
- "regex",
 ]
 
 [[package]]
@@ -345,21 +343,6 @@ dependencies = [
  "bitflags",
 ]
 
-[[package]]
-name = "regex"
-version = "1.5.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
-dependencies = [
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.6.25"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
-
 [[package]]
 name = "scopeguard"
 version = "1.1.0"