Fix processor API tests using incorrect context URL

The processor API tests were using "https://ns.flur.ee/ledger#" as a
context URL, which the external jsonld library tried to fetch as a
remote context. This was causing test failures in CI.

Changed to use the correct context URL "https://ns.flur.ee/ledger/v1"
which is a valid registered context in the library.

Author: bplatz

test/fluree/json_ld/processor/api_test.cljs

@@ -94,7 +94,7 @@
 
 (deftest to-rdf--remote-context
   (async done
-         (-> (jld-processor/to-rdf {"@context" "https://ns.flur.ee/ledger#"
+         (-> (jld-processor/to-rdf {"@context" "https://ns.flur.ee/ledger/v1"
                                     "address" ""})
              (.then (fn [result]
                       (is (= "_:b0 <https://ns.flur.ee/ledger#address> \"\" .\n"
@@ -138,7 +138,7 @@
 
 (deftest canonize--remote-context
   (async done
-         (-> (jld-processor/canonize {"@context" "https://ns.flur.ee/ledger#"
+         (-> (jld-processor/canonize {"@context" "https://ns.flur.ee/ledger/v1"
                                       "address" ""})
              (.then (fn [result]
                       (is (= "_:c14n0 <https://ns.flur.ee/ledger#address> \"\" .\n"