Gender Icons Update
Request: 
Update current gender icons to match universal symbols. 

### [Transgender icon update]
The current transgender icon is different from the universal symbol. 

**Current transgender icon:** 
<img width="200" alt="Screenshot 2024-04-29 at 13 54 10" src="https://github.com/phosphor-icons/homepage/assets/152190906/b0fbeaf7-ed61-47bb-8e48-c0e73011ea0f">

**Universal transgender symbol:**
<img width="200" alt="Screenshot 2024-04-29 at 13 52 57" src="https://github.com/phosphor-icons/homepage/assets/152190906/6a587594-2b7e-4b06-b075-4e15b0539f0b">

### [Agender icon request]
Currently, there is no option for agender (the closest being `gender-neuter`). 

**Current gender neuter icon:** 
<img width="200" alt="Screenshot 2024-04-29 at 14 05 02" src="https://github.com/phosphor-icons/homepage/assets/152190906/97fc94f1-6869-415d-b45f-86a347c342a0">

**Universal agender symbol:**
<img width="200" alt="Screenshot 2024-04-29 at 13 56 56" src="https://github.com/phosphor-icons/homepage/assets/152190906/10a65f88-bfe1-4980-8718-8b9c88df6ec6">

### [Asexual icon request]
Currently, there is no option for asexual (the closest being `gender-neuter`). 

**Current gender neuter icon:** 
<img width="200" alt="Screenshot 2024-04-29 at 14 05 02" src="https://github.com/phosphor-icons/homepage/assets/152190906/97fc94f1-6869-415d-b45f-86a347c342a0">

**Universal asexual symbol:**
<img width="200" alt="Screenshot 2024-04-29 at 14 01 26" src="https://github.com/phosphor-icons/homepage/assets/152190906/5d482168-bd8b-4d4d-8a31-de4f5c23cdb1">

Thank you!