I am a junior dev in a big tech company.
I joined last year and since then, I've been learning.
We have a senior dev who used to help me a lot in the beginning.
I was assigned an important task, I finished it all, except one thing, that I needed help with. I asked my senior colleague to help me, I did that many times, but she's busy, she didn't help me. The manager asked me to have that task done soon, and asked me to ask the senior again for help. I did ask the senior but she didn't help me.
I spent the whole weekend and I figured out the issue and fixed it myself.
How can I tell my manager that I solved it on my own, without assistance from the senior dev without being perceived as childish, and without putting the senior down?
I am asking because it is important to me that the manager knows I am improving.