Fix documentation switcher generation for 2.+ releases (#6246)

- The documentation switcher previously assumed a 1 major
  current version and did not handle cases for 2.+.
  This PR resolves that issue and adds a TODO for supporting
  additional major release logic if needed in the future.

Signed-off-by: Janusz Lisiecki <jlisiecki@nvidia.com>

Author: JanuszL

docs/conf.py

@@ -286,7 +286,17 @@
 versions = []
 # the latest is in the archive
 correction = -1 if "dev" in version_long else 0
-for i in range(10, int(version_short.split(".")[1]) + correction):
+
+# releases for current major version
+v_major = int(version_short.split(".")[0])
+v_minor = int(version_short.split(".")[1])
+for i in range(0, v_minor + correction):
+    versions.append((f"{v_major}.{i}", f"dali_{v_major}_{i}_0"))
+
+# ToDo add logic to handle other major releases after 1 and before the current
+
+# releases pre 2.0
+for i in range(10, 54):
     if i >= 34:
         versions.append((f"1.{i}", f"dali_1_{i}_0", "short_user"))
     else: