At line 88, fix the typo "thier" to "their" in the... in base.py and...

Summary:
- In thriftalchemy/controller_new/base.py at line 88, fix the typo "thier" to "their" in the comment about QueuePool parameters.
- In katran/lib/PcapWriter.h at lines 77 and 100, fix the typo "untill" to "until" in the function documentation comments.
- In xr_map_ops/common/Helpers.h at line 45, fix the typo "sorrounding" to "surrounding" in the comment describing the surroundingPointHandles parameter.

AI Review:
- security: PASSED (1.00) — All three changes are purely comment typo fixes ("thier"→"their", "untill"→"until", "sorrounding"→"surrounding") with no impact on code logic, control flow, or security.
- quality: PASSED (0.95) — All three changes are pure comment typo fixes ("thier"→"their", "untill"→"until", "sorrounding"→"surrounding") with no impact on code behavior, function signatures, or dependent code. The fixes are correct and improve readability.
- task_solution: PASSED (1.00) — All three typo corrections are accurate and minimal. No code logic was modified, so there is zero regression risk.

Reviewed By: dtolnay

Differential Revision: D96626631

fbshipit-source-id: bc688c50210c10a30b825055dd55b81487cffb60

Author: Sameer Khanna

katran/lib/PcapWriter.h

@@ -74,7 +74,7 @@ class PcapWriter {
    * @param shared_ptr<MPMCQueue<PcapMsg>> queue where we receive msg to write
    *
    * helper function which starts PcapWriter. it reads from MPMCQueue in a loop
-   * and calls writePacket on each received message from the queue untill we
+   * and calls writePacket on each received message from the queue until we
    * receive "marker" message (message with nullptr instead of pointer to IOBuf)
    * which stops the iteratation.
    */
@@ -96,7 +96,7 @@ class PcapWriter {
    * helper function which starts PcapWriter in multiWriter form.
    * it reads from MPMCQueue in a loop and depends on metadata in the message,
    * calls writePacket w/ specific for such event writer
-   * on each received message from the queue untill we
+   * on each received message from the queue until we
    * receive "marker" message (message with nullptr instead of pointer to IOBuf)
    * which stops the iteratation.
    */