docs: reword VM compatibility introduction

Author: dsloanm

reference/vm-compatibility.md

@@ -1,11 +1,11 @@
 (reference-vm-compatibility)=
 # Virtual machine compatibility
 
-The tables below provide an overview of cloud instance types that have been tested for compatibility with Charmed HPC revisions. Inclusion in a table indicates that the corresponding VM type has been tested; however, exclusion from the table simply indicates that the instance has not been tested thoroughly and may be compatible or incompatible with Charmed HPC.
+The tables below provide an overview of cloud instance types that have been tested for compatibility with Charmed HPC revisions. Inclusion in a table indicates that the corresponding VM type has been shown to work effectively; however this data is for informational purposes only and should not be construed as an official guarantee of full compatibility or comprehensive support. Exclusion from the table simply indicates that the instance has not been tested thoroughly and may be compatible or incompatible with Charmed HPC.
 
 The compatibility key:
 
-* <span style="color:green">&#x2714; Compatible</span>: Fully compatible with all Charmed HPC features. No known issues.
+* <span style="color:green">&#x2714; Compatible</span>: Compatible with all Charmed HPC features. No known issues.
 * <span style="color:orange">&#x25B3; Partial</span>: May be compatible with a subset of Charmed HPC features or may have issues that require workarounds.
 * <span style="color:red">&#x2718; Incompatible</span>: Has issues that prevent all use-cases.