PS: Make the prepare db script work on the Microsoft repo.

Author: MathiasVP

misc/scripts/prepare-db-upgrade.sh

@@ -33,7 +33,7 @@ EOF
 # default for prev_hash: the main branch of the remote for 'github/codeql'.
 # This works out as a dynamic lookup of the hash of the file in the main branch
 # of the repo.
-prev_hash=$(git remote -v | grep 'github/codeql\.git (fetch)$' | cut -f1)/main
+prev_hash=$(git remote -v | grep 'microsoft/codeql\.git (fetch)$' | cut -f1)/main
 
 while [ $# -gt 0 ]; do
   case "$1" in