bug(`@std/encoding`): Cannot perform Construct on a detached ArrayBuffer

**Describe the bug**

The following errors occurs when using `@std/encoding` `v1.0.8` but not `v1.0.7`. It seems a bug has been introduced in `v1.0.8`. The issue still occurs with the latest version `v1.0.10`.

```
error: Uncaught (in promise) TypeError: Cannot perform Construct on a detached ArrayBuffer
at new Uint8Array ()
at fromArrayLike (ext:deno_node/internal/buffer.mjs:341:15)
at fromObject (ext:deno_node/internal/buffer.mjs:353:12)
at _from (ext:deno_node/internal/buffer.mjs:209:15)
at Buffer.from (ext:deno_node/internal/buffer.mjs:234:10)
at Object.actualMethods.sign (file:///Users/leighmcculloch/Library/Caches/deno/npm/registry.npmjs.org/@stellar/stellar-base/13.1.0/lib/signing.js:82:19)
at sign (file:///Users/leighmcculloch/Library/Caches/deno/npm/registry.npmjs.org/@stellar/stellar-base/13.1.0/lib/signing.js:25:24)
at Keypair.sign (file:///Users/leighmcculloch/Library/Caches/deno/npm/registry.npmjs.org/@stellar/stellar-base/13.1.0/lib/keypair.js:178:32)
at file:///Users/leighmcculloch/Code/soroban-examples/main/multisig_1_of_n_account/stellar-cli-sign-auth-ed25519-js/main.ts:82:29
at eventLoopTick (ext:core/01_core.js:178:7)
```

**Steps to Reproduce**

I'm triggering the error in a rather large workflow that I have not yet narrowed down to a small example, but I wanted to share this sooner rather than delay because the lib is still only a few patch versions away from when the erroring behaviour was introduced.

Checkout the code:
```
git clone https://github.com/stellar/soroban-examples
cd soroban-examples
git checkout add-multisig-1-of-n-account
cd multisig_1_of_n_account/stellar-cli-sign-auth-ed25519-js
```
Change the version to the version with the bug:
```
sed -i '' 's/@std\/encoding@1.0.7/@std\/encoding@1.0.8/g' deno.json
```
Run the command:
```
echo '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' \
| deno run --allow-read --no-prompt main.ts \
--secret-key 0000000000000000000000000000000000000000000000000000000000000001 \
--signature-expiration-ledger 2296800
```

If the command is run with `@std/encoding` on v1.0.7, then it works fine.

If the command is run with `@std/encoding` on v1.0.8, the error above is output.

**Expected behavior**

No error about a detached ArrayBuffer.

**Environment**

- OS: `macOS 15`
- deno version: `2.3.1`
- std version: `v1.0.8`