Readme: add a note about session

readme.md

@@ -24,6 +24,11 @@ If it's not, edit the `~/.bashrc` file (or `~/.zshrc`)
 export EDITOR=nano
 ```
 
+Don't forget to start a new session or execute the following command:
+```bash
+source ~/.bashrc
+```
+
 Then mark this script as executable:
 ```bash
 chmod +x histd.sh
@@ -56,4 +61,4 @@ This command concatenates all files and prefixes each with the filename.
 #         ├── 18.md
 #         └── 19.md
 ```
-Required programs: `tree`
+Required programs: `tree`.