Merge pull request #291 from spring-cloud/dependabot/npm_and_yarn/docs/4.3.x/antora/collector-extension-1.0.3

Bump @antora/collector-extension from 1.0.0-alpha.3 to 1.0.3 in /docs

Author: ryanjbaxter

docs/package.json

@@ -2,7 +2,7 @@
 	"dependencies": {
 		"antora": "3.2.0-alpha.4",
 		"@antora/atlas-extension": "1.0.0-alpha.2",
-		"@antora/collector-extension": "1.0.0-alpha.3",
+		"@antora/collector-extension": "1.0.3",
 		"@asciidoctor/tabs": "1.0.0-beta.6",
 		"@springio/antora-extensions": "1.11.1",
 		"@springio/asciidoctor-extensions": "1.0.0-alpha.10"