Add in:build Label to Dependabot PRs

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>

Author: jzheaux

.github/dependabot.yml

@@ -14,6 +14,7 @@ updates:
       timezone: Etc/UTC
     labels:
       - 'type: dependency-upgrade'
+      - 'in: build'
     registries:
       - shibboleth
     ignore:
@@ -60,6 +61,7 @@ updates:
       timezone: Etc/UTC
     labels:
       - 'type: dependency-upgrade'
+      - 'in: build'
     registries:
       - shibboleth
     ignore:
@@ -111,6 +113,7 @@ updates:
       timezone: Etc/UTC
     labels:
       - 'type: dependency-upgrade'
+      - 'in: build'
     registries:
       - shibboleth
     ignore: