Build(deps): update rustls-pemfile requirement from 1.0.3 to 2.1.1

[dependabot[bot]]

Updates the requirements on rustls-pemfile to permit the latest version.

Release notes

Sourced from rustls-pemfile's releases.

2.1.1

Headlines

• Leading whitespace in PEM document bodies is now trimmed in addition to trailing whitespace.

What's Changed

• Trim leading contiguous whitespace, fix nightly clippy warns by @​cpu in rustls/pemfile#41
• v2.1.1 preparation by @​cpu in rustls/pemfile#42

Full Changelog: https://github.com/rustls/pemfile/compare/v/2.1.0...v/2.1.1

Commits

• 77a6c99 Cargo: version 2.1.0 -> 2.1.1
• 09a08fd proj: add Cargo.lock, use --locked in CI
• 95152b4 pemfile: also trim leading contiguous content whitespace
• fc3414f lib: clean up no_std and use of std in test code
• e2d220a Cargo: version 2.0.0 -> 2.1.0
• de3d0ae add certificate signing request
• e0da4ce Bump to v2.0.0
• 12b9d79 Use pki-types v1
• 48790bc Bump version to alpha.2
• 3aa829c add an opt-out std feature
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.