Resolve "There is nothing about ZSH"

Closes #216 (closed), #217 (closed)

doc.zih.tu-dresden.de/docs/software/zsh.md

 # ZSH
 
-The ZSH, short for `z-shell`, is an alternative shell for Linux that offers many convenience features
+!!! warning
+    Though all efforts have been made to ensure the accuracy and 
+    currency of the content on this website, please be advised that 
+    some content might be out of date and there is no continuous 
+    website support available. In case of any ambiguity or doubts, 
+    users are advised to do their own research on the content's 
+    accuracy and currency.
+
+The [ZSH](https://www.zsh.org), short for `z-shell`, is an alternative shell for Linux that offers many convenience features
 for productive use that `bash`, the default shell, does not offer.
 
 This should be a short introduction to `zsh` and offer some examples that are especially useful on Taurus.
@@ -27,7 +35,7 @@ more details.
 ### Auto-completion
 
 `zsh` offers more auto-completion features than `bash`. You can auto-complete programs, filenames, parameters,
-`man`-pages and a lot more, and you can cycle through the suggestions with `<TAB>`.
+`man`-pages and a lot more, and you can cycle through the suggestions with `TAB`-button.
 
 ![Cycling through auto-completion for parameter names](misc/zsh_autocomplete_parameters.png)
 
@@ -96,7 +104,7 @@ mcd () {
 You can then
 
 ```
-marie@login$ mcd non-existant-directory
+marie@login$ mcd non-existent-directory
 ```
 
 and it will create it and `cd` into it
@@ -187,7 +195,7 @@ If there are multiple jobs running, it will show you a list of them and let you
 function ftails {
     JOBID=$1
     if [[ -z $JOBID ]]; then
-        JOBS=$(squeue --format="%i \\'%j\\' " -u $USER | grep -v JOBID)
+        JOBS=$(squeue --format="%i \\'%j\\' " --me | grep -v JOBID)
         NUMBER_OF_JOBS=$(echo "$JOBS" | wc -l)
 
         JOBID=
@@ -215,7 +223,7 @@ function ftails {
 This is way faster to type:
 
 ```bash
-alias sq="squeue -u $USER"
+alias sq="squeue --me"
 ```
 
 Now you only need to type `sq` instead of `squeue -u $USER`.