make the download warning much more aggressive (#2382)

* make the download warning much more aggressive

* adjustments

* reword

* change admonition color

* add the note to the header

* Fix note syntax in downloads/index.md

* Revise manual download note for clarity

Updated note on manual downloads to clarify installation instructions.

* fix colons

* try a rewording

* code formatting looks bad in header

---------

Co-authored-by: Viral B. Shah <[email protected]>

Author: Krastanov

_css/franklin.css

@@ -100,14 +100,16 @@
     border-radius: 4px;
     font-size: 1rem; }
     .admonition-note {
-      background-color: #3d6e91;
+      margin: 1em 0;
+      background-color: #c5deff;
       border-color: #209cee; }
       .admonition-note > .admonition-title {
         background-color: #209cee;
         color: #fff; }
       .admonition-note > .admonition-body {
         color: rgba(0, 0, 0, 0.7); }
     .admonition-warn {
+      margin: 1em 0;
       background-color: #fff3c5;
       border-color: #ffdd57; }
       .admonition.warn > .admonition-title {

config.md

@@ -35,14 +35,14 @@ Add here global latex commands to use throughout your pages.
 -->
 \newcommand{\note}[2]{
 @@admonition-note
-@@admonition-title Note #1 @@
+@@admonition-title Note: #1 @@
 @@admonition-body #2 @@
 @@
 }
 
 \newcommand{\warn}[2]{
 @@admonition-warn
-@@admonition-title Warning #1 @@
+@@admonition-title Warning: #1 @@
 @@admonition-body #2 @@
 @@
 }

downloads/index.md

@@ -1,8 +1,8 @@
 @def title = "Download Julia"
 
-# Manual Downloads
+# Manual Downloads (Not recommended for typical installations)
 
-**This page is not for most users:** See [Install](/install/) for how to install Julia the recommended way using `juliaup`. Please see [platform specific instructions](/downloads/platform/) for further manual installation instructions. If the official binaries do not work for you, please [file an issue in the Julia project](https://github.com/JuliaLang/julia/issues).
+\note{juliaup is the proper way to install julia, not these downloads}{See the [installation instructions](/install/) on using `juliaup` to install Julia. If the official binaries do not work for you, please [file an issue in the Julia project](https://github.com/JuliaLang/julia/issues).}
 
 ~~~
 <h4 id=current_stable_release><a href="#current_stable_release">Current stable release: v{{stable_release}} ({{stable_release_date}})</a></h4>