Update READMEs (quoting of branch/tag name settings)

README.md

@@ -365,16 +365,16 @@ This will make all builds (not just for your module) verbose.
 
 Update the submodule in `.ci` first, then change your CI configuration
 (if needed) and commit both to your module. E.g., to update your Travis
-setup to release 3.1.0 of ci-scripts:
+setup to release 3.1.1 of ci-scripts:
 ```bash
 cd .ci
-git pull origin v3.1.0
+git pull origin v3.1.1
 cd -
 git add .ci
   # if needed:
   edit .travis.yml     # and/or AppVeyor/GitHub Actions configuration
   git add .travis.yml
-git commit -m "Update ci-scripts submodule to v3.1.0"
+git commit -m "Update ci-scripts submodule to v3.1.1"
 ```
 
 Check the example configuration files inside ci-scripts (and their

github-actions/README.md

@@ -48,6 +48,18 @@
  5. Push your changes and click on the `Actions` tab of your GitHub repository
     page to see your build results.
 
+## Specifics
+
+#### Quote Environment Variable Values
+
+Variable settings distinguish between numerical and string values.
+Better quote all branch and tag names. E.g.,
+```yaml
+env:
+  BASE: "7.0"
+```
+to avoid ci-scripts trying to `git clone` with `--branch 7`.
+
 ## Caches
 
 GitHub Actions provides caching of dependencies.