Update windows CI

Author: pamelafox

.github/workflows/app-tests.yaml

@@ -59,12 +59,12 @@ jobs:
           run: |
               call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
               cd %TEMP%
-              git clone --branch v0.7.4 https://github.com/pgvector/pgvector.git
+              git clone --branch v0.8.1 https://github.com/pgvector/pgvector.git
               cd pgvector
               nmake /NOLOGO /F Makefile.win
               nmake /NOLOGO /F Makefile.win install
-              sc config postgresql-x64-14 start=auto
-              net start postgresql-x64-14
+              sc config postgresql-x64-17 start=auto
+              net start postgresql-x64-17
               "%PGBIN%/psql" -d postgres -c "CREATE EXTENSION vector"
 
         - name: (Linux) Install pgvector and set password