fix(breadcrumb): center breadcrumb itemLink text

- although the .spectrum-Breadcrumb-item was aligned center, the items
within it were not. This should align any children to the center of the
parent item, and correct the visual misalignment between the text/button
and the separator icon

- chore(breadcrumb): create changeset

.changeset/gold-spies-learn.md

@@ -0,0 +1,5 @@
+---
+"@spectrum-css/breadcrumb": patch
+---
+
+Aligns breadcrumb item text node to center of container. This should ensure the text and separator icon are center-aligned.

components/breadcrumb/index.css

@@ -176,6 +176,8 @@
  display: inline-flex;
  white-space: nowrap;
 
+ align-items: center;
+
  font-family: var(--mod-breadcrumbs-font-family, var(--spectrum-breadcrumbs-font-family));
  font-size: var(--mod-breadcrumbs-font-size, var(--spectrum-breadcrumbs-font-size));
  font-weight: var(--mod-breadcrumbs-font-weight, var(--spectrum-breadcrumbs-font-weight));