Apply suggestions from code review

Co-authored-by: Laurențiu Nicola <[email protected]>

Author: jonas-schievink

crates/rust-analyzer/src/diagnostics/test_data/macro_compiler_error.txt

@@ -51,7 +51,7 @@
                                 },
                             },
                         },
-                        message: "Exact error occured here",
+                        message: "Exact error occurred here",
                     },
                 ],
             ),

crates/rust-analyzer/src/diagnostics/to_proto.rs

@@ -266,7 +266,7 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
                 let information_for_additional_diagnostic =
                     vec![lsp_types::DiagnosticRelatedInformation {
                         location: location.clone(),
-                        message: "Exact error occured here".to_string(),
+                        message: "Exact error occurred here".to_string(),
                     }];
 
                 let diagnostic = lsp_types::Diagnostic {