Tiny typo fix in "To Base85" operation (#2118)

This adjusts spelling in the "To Base85" operation from "delimeter" to
"delimiter".

Co-authored-by: GCHQ Developer C85297 <95289555+C85297@users.noreply.github.com>

src/core/operations/ToBase85.mjs

@@ -33,7 +33,7 @@ class ToBase85 extends Operation {
                 value: ALPHABET_OPTIONS
             },
             {
-                name: "Include delimeter",
+                name: "Include delimiter",
                 type: "boolean",
                 value: false
             }