Update installation.qmd (#831)

python/docs/guide/installation.qmd

@@ -6,15 +6,9 @@ To install Kaskada, you need to be using Python >= 3.8.
 We suggest using 3.11 or newer, since that provides more precise error locations.
 
 ```{.bash filename="Installing Kaskada"}
-pip install kaskada>=0.6.0-a.3
+pip install kaskada
 ```
 
-::: {.callout-warning}
-This version of Kaskada is currently a pre-release, as indicated by the `-a.0` suffix.
-It will not be installed by default if you `pip install kaskada`.
-You need to either use `pip install --pre kaskada` or specify a specific version, as shown in the example.
-:::
-
 ::: {.callout-tip}
 Depending on you Python installation and configuration you may have `pip3` instead of `pip` available in your terminal.
 If you do have `pip3` replace pip with `pip3` in your command, i.e., `pip3 install kaskada`.