inno: bump keyring to 18.0.1 to avoid AttributeError (issue6043)

The error seems to be harmless, because it happens after closing the connection.
For whatever reason, this isn't bundled with the Wix installer.

https://github.com/jaraco/keyring/issues/386
https://bitbucket.org/Mekk/mercurial_keyring/issues/63/attributeerror-during-process-finish-with

contrib/packaging/inno/requirements.txt

@@ -22,9 +22,9 b' entrypoints==0.3 \\'
     --hash=sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19 \
     --hash=sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451 \
     # via keyring
-keyring==18.0.0 \
-    --hash=sha256:12833d2b05d2055e0e25931184af9cd6a738f320a2264853cabbd8a3a0f0b65d \
-    --hash=sha256:ca33f5ccc542b9ffaa196ee9a33488069e5e7eac77d5b81969f8a3ce74d0230c
+keyring==18.0.1 \
+    --hash=sha256:67d6cc0132bd77922725fae9f18366bb314fd8f95ff4d323a4df41890a96a838 \
+    --hash=sha256:7b29ebfcf8678c4da531b2478a912eea01e80007e5ddca9ee0c7038cb3489ec6
 pygments==2.3.1 \
     --hash=sha256:5ffada19f6203563680669ee7f53b64dabbeb100eb51b61996085e99c03b284a \
     --hash=sha256:e8218dd399a61674745138520d0d4cf2621d7e032439341bc3f647bff125818d