qa: Point univalue update checker at correct upstream

Bitcoin Core doesn't actually use tags for managing versions of their
forked dependencies, so we should separately rework this logic for all
of the subtree-managed dependencies. But this at least prevents false
positives.

qa/zcash/postponed-updates.txt

@@ -14,10 +14,6 @@ libcxx 11.1.0 2021-07-01
 
 bdb 18.1.40 2021-07-01
 
-univalue 1.0.4 2021-07-01
-univalue 1.0.5 2021-07-01
-univalue 1.1.1 2021-07-01
-
 # Boost 1.75 starts using the statx syscall where available, which causes
 # permission errors in some environments.
 # https://github.com/zcash/zcash/issues/4945

qa/zcash/updatecheck.py

@@ -92,8 +92,8 @@ def get_dependency_list():
                 { "v1.13": (1, 13) }),
             LevelDbVersionGetter()),
         Dependency("univalue",
-            GithubTagReleaseLister("jgarzik", "univalue", "^v(\d+)\.(\d+)\.(\d+)$",
-                { "v1.1.1": (1, 1, 1) }),
+            GithubTagReleaseLister("bitcoin-core", "univalue", "^v(\d+)\.(\d+)\.(\d+)$",
+                { "v1.0.1": (1, 0, 1) }),
             UnivalueVersionGetter()),
         Dependency("utfcpp",
             GithubTagReleaseLister("nemtrif", "utfcpp", "^v(\d+)\.(\d+)(?:\.(\d+))?$",