Update mssql plugin page to mention CONFIG file

[geographika]

Based on issues mentioned in https://lists.osgeo.org/pipermail/mapserver-users/2024-September/083597.html Includes minor format fixes and adding keywords to the conf.py file.

[github-actions[bot]]

The backport to branch-8-2 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

``` error: could not apply 549cb9a6... Update mssql plugin page to mention CONFIG file hint: After resolving the conflicts, mark them with hint: "git add/rm ", then run hint: "git cherry-pick --continue". hint: You can instead skip this commit with "git cherry-pick --skip". hint: To abort and get back to the state before "git cherry-pick", hint: run "git cherry-pick --abort". hint: Disable this message with "git config advice.mergeConflict false" ```

stdout

``` Auto-merging conf.py CONFLICT (content): Merge conflict in conf.py ```

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-branch-8-2 branch-8-2
# Navigate to the new working tree
cd .worktrees/backport-branch-8-2
# Create a new branch
git switch --create backport-967-to-branch-8-2
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 549cb9a6de78d78d2ae857e824f7790a730d41a6
# Push it to GitHub
git push --set-upstream origin backport-967-to-branch-8-2
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-branch-8-2

Then, create a pull request where the base branch is branch-8-2 and the compare/head branch is backport-967-to-branch-8-2.