chore: updated virtual environment path in README and script

### CHANGES
- Updated virtual environment path in README installation instructions.
- Modified virtual environment activation path in `zoom-manage` script.

Author: ksylvan

Diff for: backend/README.md

@@ -23,7 +23,7 @@ This FastAPI server provides endpoints to manage and track participants of a Zoo
 
    ```bash
    curl -LsSf https://astral.sh/uv/install.sh | sh
-   uv venv .venv/zoom
+   uv venv .venv
    ```
 
    The output will look like this:

Diff for: zoom-manage

@@ -433,7 +433,7 @@ on runBackendServer()
 		error "Server is already running. " & jsonOutput number -1
 	end if
 	set titleString to "\\033]0;" & scriptName & " Backend Server\\007"
-	set cmd to "echo -n -e \"" & titleString & "\";cd " & topLevelDirectory & "backend; . ../.venv/zoom/bin/activate; ./server.py; exit"
+	set cmd to "echo -n -e \"" & titleString & "\";cd " & topLevelDirectory & "backend; . ../.venv/bin/activate; ./server.py; exit"
 	do shell script "open -a Terminal " & topLevelDirectory
 	tell application "Terminal"
 		activate