Merge branch 'fix-memory-requirement-formula' into 'master'

Fix a formula correctly

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141694



Merged-by: Evan Read <eread@gitlab.com>
Approved-by: Evan Read <eread@gitlab.com>
Co-authored-by: miya_789 <miya.nori42395@gmail.com>

doc/install/requirements.md

@@ -199,7 +199,7 @@ Take for example the following scenarios:
   [
   the lowest number from
     - number of cores: 2
-    - memory limit: (8 - 1.5) = 6
+    - memory limit: (8 - 1.5) = 6.5
   ]
   ```