Commas to semicolons in clippy.toml reasons (#15592)

The things being separated are sentences. So I think semicolons are the
right separators to use.

changelog: none

Author: blyxyas

clippy.toml

@@ -6,12 +6,12 @@ lint-commented-code = true
 
 [[disallowed-methods]]
 path = "rustc_lint::context::LintContext::lint"
-reason = "this function does not add a link to our documentation, please use the `clippy_utils::diagnostics::span_lint*` functions instead"
+reason = "this function does not add a link to our documentation; please use the `clippy_utils::diagnostics::span_lint*` functions instead"
 
 [[disallowed-methods]]
 path = "rustc_lint::context::LintContext::span_lint"
-reason = "this function does not add a link to our documentation, please use the `clippy_utils::diagnostics::span_lint*` functions instead"
+reason = "this function does not add a link to our documentation; please use the `clippy_utils::diagnostics::span_lint*` functions instead"
 
 [[disallowed-methods]]
 path = "rustc_middle::ty::context::TyCtxt::node_span_lint"
-reason = "this function does not add a link to our documentation, please use the `clippy_utils::diagnostics::span_lint_hir*` functions instead"
+reason = "this function does not add a link to our documentation; please use the `clippy_utils::diagnostics::span_lint_hir*` functions instead"

tests/ui-internal/disallow_span_lint.stderr

@@ -4,7 +4,7 @@ error: use of a disallowed method `rustc_lint::context::LintContext::span_lint`
 LL |     cx.span_lint(lint, span, |lint| {
    |        ^^^^^^^^^
    |
-   = note: this function does not add a link to our documentation, please use the `clippy_utils::diagnostics::span_lint*` functions instead
+   = note: this function does not add a link to our documentation; please use the `clippy_utils::diagnostics::span_lint*` functions instead
 note: the lint level is defined here
   --> tests/ui-internal/disallow_span_lint.rs:2:9
    |
@@ -17,7 +17,7 @@ error: use of a disallowed method `rustc_middle::ty::context::TyCtxt::node_span_
 LL |     tcx.node_span_lint(lint, hir_id, span, |lint| {
    |         ^^^^^^^^^^^^^^
    |
-   = note: this function does not add a link to our documentation, please use the `clippy_utils::diagnostics::span_lint_hir*` functions instead
+   = note: this function does not add a link to our documentation; please use the `clippy_utils::diagnostics::span_lint_hir*` functions instead
 
 error: aborting due to 2 previous errors