fix(manager): correctly escape the dot character in fileMatch (#17048)

lib/config/index.spec.ts

lib/modules/manager/cargo/index.ts

lib/modules/manager/circleci/index.ts

lib/modules/manager/cloudbuild/index.ts

lib/modules/manager/composer/index.ts

lib/modules/manager/droneci/index.ts

lib/modules/manager/fleet/index.ts

lib/modules/manager/git-submodules/index.ts

lib/modules/manager/gomod/index.ts

lib/modules/manager/gradle-wrapper/index.ts

lib/modules/manager/helm-values/index.ts

lib/modules/manager/helmfile/index.ts

lib/modules/manager/helmv3/index.ts

lib/modules/manager/jsonnet-bundler/index.ts

lib/modules/manager/meteor/index.ts

lib/modules/manager/nodenv/index.ts

lib/modules/manager/npm/index.ts

lib/modules/manager/pip_setup/index.ts

lib/modules/manager/pyenv/index.ts

lib/modules/manager/travis/index.ts