Use more lax assertion when checking exception message (#1712)

Author: alcaeus

tests/SpecTests/ClientSideEncryptionSpecTest.php

@@ -612,7 +612,7 @@ public function testViewsAreProhibited(): void
             $previous = $e->getPrevious();
 
             $this->assertInstanceOf(EncryptionException::class, $previous);
-            $this->assertSame('cannot auto encrypt a view', $previous->getMessage());
+            $this->assertStringContainsString('cannot auto encrypt a view', $previous->getMessage());
         }
     }