appveyor: install git-annex from datalad/packages since brew is no go…

…od ATM

.appveyor.yml

@@ -101,7 +101,7 @@ environment:
       # does not give a functional installation
       # INSTALL_GITANNEX: git-annex -m snapshot
       #INSTALL_GITANNEX: git-annex=8.20201129
-      INSTALL_GITANNEX: git-annex
+      INSTALL_GITANNEX: git-annex -m datalad/packages
       DATALAD_LOCATIONS_SOCKETS: /Users/appveyor/DLTMP/sockets
       CODECOV_BINARY: https://cli.codecov.io/v0.7.4/macos/codecov
 
@@ -155,7 +155,7 @@ environment:
           datalad.ui
       APPVEYOR_BUILD_WORKER_IMAGE: macos-monterey
       PY: 3.9
-      INSTALL_GITANNEX: git-annex
+      INSTALL_GITANNEX: git-annex -m datalad/packages
       DATALAD_LOCATIONS_SOCKETS: /Users/appveyor/DLTMP/sockets
       CODECOV_BINARY: https://cli.codecov.io/v0.7.4/macos/codecov
     - ID: MacP39a2
@@ -165,7 +165,7 @@ environment:
           datalad.distributed
       APPVEYOR_BUILD_WORKER_IMAGE: macos-monterey
       PY: 3.9
-      INSTALL_GITANNEX: git-annex
+      INSTALL_GITANNEX: git-annex -m datalad/packages
       DATALAD_LOCATIONS_SOCKETS: /Users/appveyor/DLTMP/sockets
       CODECOV_BINARY: https://cli.codecov.io/v0.7.4/macos/codecov
 
@@ -229,7 +229,7 @@ cache:
   - /home/appveyor/.cache/pip -> .appveyor.yml
   # TODO: where is the cache on macOS?
   #- /Users/appveyor/.cache/pip -> .appveyor.yml
-  # TODO: Can we cache `brew`?
+  # TODO: Can we cache `rew`?
   #- /usr/local/Cellar
   #- /usr/local/bin