Fix wording to be more definitive

smarr · eregon · web-flow · commit 9a8cec577edf · 2021-09-09T11:06:57.000+01:00
Co-authored-by: Benoit Daloze &lt;eregontp@gmail.com&gt;
diff --git a/doc/contributor/using-eclipse.md b/doc/contributor/using-eclipse.md
@@ -70,5 +70,5 @@ MX_BUILD_EXPLODED=true
 LINKY_LAYOUT=*.jar
 ```
 
-These settings are not recommended for producing distributable artifacts, but
+These settings must not be used for producing distributable artifacts, but
 make development much smoother.
