Warning: qualify `Alg` as `Algorithm.Alg`

[ViralBShah]

With Julia 1.12:

Precompiling packages finished.
  90 dependencies successfully precompiled in 55 seconds. 132 already precompiled.
  1 dependency had output during precompilation:
┌ ImageFiltering
│  WARNING: Constructor for type "Alg" was extended in `ImageFiltering` without explicit qualification or import.
│    NOTE: Assumed "Alg" refers to `Algorithm.Alg`. This behavior is deprecated and may differ in future versions.`
│    NOTE: This behavior may have differed in Julia versions prior to 1.12.
│    Hint: If you intended to create a new generic function of the same name, use `function Alg end`.
│    Hint: To silence the warning, qualify `Alg` as `Algorithm.Alg` in the method signature or explicitly `import Algorithm: Alg`.

[ViralBShah]

Fixed in #283