Add link to Cloud Functions runtimes official doc (#4775) (#3244)

- Add more examples: `nodejs14`, `java11`, `ruby26`
- Remove deprecated runtiume from examples: `nodejs8`

Co-authored-by: Nader Ghanbari <[email protected]>
Signed-off-by: Modular Magician <[email protected]>

Co-authored-by: Nader Ghanbari <[email protected]>

Author: modular-magician

.changelog/4775.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

website/docs/r/cloudfunctions_function.html.markdown

@@ -38,7 +38,7 @@ resource "google_storage_bucket_object" "archive" {
 resource "google_cloudfunctions_function" "function" {
   name        = "function-test"
   description = "My function"
-  runtime     = "nodejs12"
+  runtime     = "nodejs14"
 
   available_memory_mb   = 128
   source_archive_bucket = google_storage_bucket.bucket.name
@@ -74,7 +74,7 @@ resource "google_storage_bucket_object" "archive" {
 resource "google_cloudfunctions_function" "function" {
   name        = "function-test"
   description = "My function"
-  runtime     = "nodejs12"
+  runtime     = "nodejs14"
 
   available_memory_mb   = 128
   source_archive_bucket = google_storage_bucket.bucket.name
@@ -109,7 +109,7 @@ The following arguments are supported:
 * `name` - (Required) A user-defined name of the function. Function names must be unique globally.
 
 * `runtime` - (Required) The runtime in which the function is going to run.
-Eg. `"nodejs8"`, `"nodejs10"`, `"nodejs12"`, `"python37"`, `"python38"`,`"go111"`, `"go113"`.
+Eg. `"nodejs10"`, `"nodejs12"`, `"nodejs14"`, `"python37"`, `"python38"`, `"python39"`, `"dotnet3"`, `"go113"`, `"java11"`, `"ruby27"`, etc. Check the [official doc](https://cloud.google.com/functions/docs/concepts/exec#runtimes) for the up-to-date list.
 
 - - -