chore(ci): rewrite arm builds support warning

Co-authored-by: olgahryniuk <[email protected]>

Author: jpraynaud

.github/workflows/actions/prepare-distribution/action.yml

@@ -123,7 +123,7 @@ runs:
         | mithril-signer     |     ✔     |   ✔ ⁽\*⁾    |     ⛔      |     ⛔      |
         | mithril-client     |     ✔     |   ✔ ⁽\*⁾    |      ✔      |      ✔      |
 
-        ⁽\*⁾⚠️ Linux arm64 builds are not guaranteed, use at your own risk.
+        ⁽\*⁾⚠️ Linux arm64 builds are provided on a best-effort basis and are not officially supported.
 
         ### Linux Requirements
         The Linux binaries target \`glibc\`: to run them or install the \`.deb\` packages you must have \`glibc\` version \`2.35+\` installed.