Add additional release dates

Signed-off-by: Dan Garfield <dan.garfield@octopus.com>

docs/developer-guide/release-process-and-cadence.md

@@ -4,8 +4,6 @@
 
 ### Schedule
 
-These are the upcoming releases dates:
-
 | Release | Release Candidate 1   | General Availability | Release Champion                                        | Release Approver                                      | Checklist                                                     |
 |---------|-----------------------|----------------------|---------------------------------------------------------|-------------------------------------------------------|---------------------------------------------------------------|
 | v2.6    | Monday, Dec. 19, 2022 | Monday, Feb. 6, 2023 | [William Tam](https://github.com/wtam2018)              | [William Tam](https://github.com/wtam2018)            | [checklist](https://github.com/argoproj/argo-cd/issues/11563) |
@@ -17,10 +15,11 @@ These are the upcoming releases dates:
 | v2.12   | Monday, Jun. 17, 2024 | Monday, Aug. 5, 2024 | [Ishita Sequeira](https://github.com/ishitasequeira)    | [Pavel Kostohrys](https://github.com/pasha-codefresh) | [checklist](https://github.com/argoproj/argo-cd/issues/19063) |
 | v2.13   | Monday, Sep. 16, 2024 | Monday, Nov. 4, 2024 | [Regina Voloshin](https://github.com/reggie-k)          | [Pavel Kostohrys](https://github.com/pasha-codefresh) | [checklist](https://github.com/argoproj/argo-cd/issues/19513) |
 | v2.14   | Monday, Dec. 16, 2024 | Monday, Feb. 3, 2025 | [Ryan Umstead](https://github.com/rumstead)             | [Pavel Kostohrys](https://github.com/pasha-codefresh) | [checklist](https://github.com/argoproj/argo-cd/issues/20869) |
-| v3.0    | Monday, Mar. 17, 2025 | Tuesday, May 6, 2025 | [Regina Voloshin](https://github.com/reggie-k)          |                                                       | [checklist](https://github.com/argoproj/argo-cd/issues/21735) |
+| v3.0    | Monday, Mar. 17, 2025 | Tuesday, May 6, 2025 | [Regina Voloshin](https://github.com/reggie-k)          |  [Regina Voloshin](https://github.com/reggie-k)                                                       | [checklist](https://github.com/argoproj/argo-cd/issues/21735) |
 | v3.1    | Monday, Jun. 16, 2025 | Monday, Aug. 4, 2025 | [Christian Hernandez](https://github.com/christianh814) | [Alexandre Gaudreault](https://github.com/agaudreault) | [checklist](#) |
 | v3.2    | Monday, Sep. 15, 2025 | Monday, Nov. 3, 2025 | [Nitish Kumar](https://github.com/nitishfy)             |                                                       | [checklist](#) |
 | v3.3    | Monday, Dec. 15, 2025 | Monday, Feb. 2, 2026 |                                                         |                                                       |
+| v3.4    | Monday, Apr. 6, 2026 | Monday, Jun. 1, 2026 |                                                         |                                                       |
 
 Actual release dates might differ from the plan by a few days.