Fix nextcloudignore paths

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.nextcloudignore

@@ -1,28 +1,28 @@
-build/
-.git
-.github
-docs/
-tests
-babel.config.js
-.editorconfig
-.eslintrc.js
-.nextcloudignore
-webpack.*.js
-.codecov.yml
-composer.json
-composer.lock
-_config.yml
-.drone.yml
-.travis.yml
-.eslintignore
-.eslintrc.yml
-.gitignore
-issue_template.md
-krankerl.toml
-Makefile
-mkdocs.yml
-run-eslint.sh
-package.json
-package-lock.json
-node_modules/
-src/
+/build/
+/.git
+/.github
+/docs/
+/tests
+/babel.config.js
+/.editorconfig
+/.eslintrc.js
+/.nextcloudignore
+/webpack.*.js
+/.codecov.yml
+/composer.json
+/composer.lock
+/_config.yml
+/.drone.yml
+/.travis.yml
+/.eslintignore
+/.eslintrc.yml
+/.gitignore
+/issue_template.md
+/krankerl.toml
+/Makefile
+/mkdocs.yml
+/run-eslint.sh
+/package.json
+/package-lock.json
+/node_modules/
+/src/