Fix regression after renaming *algorithm variables

Fixes #75 (PR #76).

* * *

After 6592be2
(#68) , if URI contains
the `algorithm` optional parameter, e.g.

```
otpauth://totp/ACME%20Co:john.doe@email.com?secret=HXDMVJECJJWSRB3HWIZR4IFUGFTMXBOZ&issuer=ACME%20Co&algorithm=SHA1&digits=6&period=30
```

the application will raise an error:

```
[2023-12-21 09:42:02,769] DEBUG:otp:352: 1 validation error for Uri
schema_ -> TOTPUriSchema -> parameters -> algorithm
  extra fields not permitted (type=value_error.extra)
```

onetimepass/otpauth/schemas.py

@@ -5,6 +5,7 @@
 from pydantic import BaseModel
 from pydantic import constr
 from pydantic import Extra
+from pydantic import Field
 from pydantic import validator
 
 from .errors import IllegalColon
@@ -15,7 +16,9 @@
 class BaseUriParameters(BaseModel, extra=Extra.forbid):
  secret: str
  issuer: str | None
- hash_algorithm: Literal["SHA1", "SHA256", "SHA512"] = "SHA1"
+ hash_algorithm: Literal["SHA1", "SHA256", "SHA512"] = Field(
+ "SHA1", alias="algorithm"
+ )
  digits: int
 
  @validator("issuer")