Bump base32 from 0.4.0 to 0.5.1

Bumps [base32](https://github.com/andreasots/base32) from 0.4.0 to 0.5.1.
- [Commits](andreasots/base32@v0.4.0...v0.5.1)

---
updated-dependencies:
- dependency-name: base32
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

CHANGELOG.md

@@ -9,6 +9,7 @@ Unreleased
 - Adjusted program to use Rust Edition 2021
 - Updated minimum supported Rust version to `1.56.0`
 - Bumped `anyhow` dependency to `1.0.89`
+- Bumped `base32` dependency to `0.5.1`
 - Bumped `directories` dependency to `5.0.1`
 - Bumped `libc` dependency to `0.2.159`
 - Bumped `serde` dependency to `1.0.147`

Cargo.lock

@@ -42,7 +42,7 @@ incremental = false
 version = "1.0"
 
 [dependencies.base32]
-version = "0.4.0"
+version = "0.5.1"
 
 [dependencies.directories]
 version = "5"

Cargo.toml

@@ -887,8 +887,10 @@ fn prepare_ascii_secret(secret: &str) -> anyhow::Result<String> {
 /// Prepare a base32 secret string for libnitrokey.
 fn prepare_base32_secret(secret: &str) -> anyhow::Result<String> {
   // Some sites display the base32 secret in groups separated by spaces, we want to ignore them.
-  let secret = secret.replace(' ', "");
-  base32::decode(base32::Alphabet::RFC4648 { padding: false }, &secret)
+  let mut secret = secret.replace(' ', "");
+  let () = secret.make_ascii_lowercase();
+
+  base32::decode(base32::Alphabet::Rfc4648Lower { padding: false }, &secret)
     .map(|vec| format_bytes(&vec))
     .context("Failed to parse base32 secret")
 }