CASSANDRA-21155: Fix CQL version errors in QuickStart guide

[arvindKandpal-ksolves]

The QuickStart guide currently references CQL versions 3.4.5 and 3.4.6 in the docker run commands. However, the cassandra:latest image (currently Cassandra 5.0.x) runs CQL spec 3.4.7.

Attempting to follow the current guide results in a connection failure because the older CQL versions are not supported by the latest image.

Verification:

1. Running the command from the current guide fails:
   ProtocolError("cql_version '3.4.5' is not supported... Supported versions: [u'3.4.7']")

2. Running with updated version (3.4.7) succeeds:
   [cqlsh 5.0.1 | Cassandra 5.0.6 | CQL spec 3.4.7 | Native protocol v5]

Changes:

• Updated CQLVERSION env var in Step 4 to 3.4.7.
• Updated --cqlversion flag in Step 5 to 3.4.7.
• Updated example output in Step 5 to reflect current versions.

patch by Arvind Kandpal; reviewed by TBD for CASSANDRA-21155

[michaelsembwever]

Is there really any reason why we're specifying -e CQLVERSION and --cqlversion='3.4.7 at all ?

Is it possible to just removed them altogether…?

[YiyunMichaelSun]

Is there really any reason why we're specifying -e CQLVERSION and --cqlversion='3.4.7 at all ?

Is it possible to just removed them altogether…?

I'm not sure to be honest as I haven't read the source code for both cassandra and cqlsh. But at least 3.4.5 and 3.4.6 isn't the correct versions. So I'd rather just fix them now and discuss whether we need them later.

[YiyunMichaelSun]

The QuickStart guide currently references CQL versions 3.4.5 and 3.4.6 in the docker run commands. However, the cassandra:latest image (currently Cassandra 5.0.x) runs CQL spec 3.4.7.

Attempting to follow the current guide results in a connection failure because the older CQL versions are not supported by the latest image.

Verification:

1. Running the command from the current guide fails:
   `ProtocolError("cql_version '3.4.5' is not supported... Supported versions: [u'3.4.7']")`

2. Running with updated version (3.4.7) succeeds:
   `[cqlsh 5.0.1 | Cassandra 5.0.6 | CQL spec 3.4.7 | Native protocol v5]`

Changes:

* Updated `CQLVERSION` env var in Step 4 to `3.4.7`.

* Updated `--cqlversion` flag in Step 5 to `3.4.7`.

* Updated example output in Step 5 to reflect current versions.

patch by Arvind Kandpal; reviewed by TBD for CASSANDRA-21155

Thanks for implementing the fix, Arvind.