chore: bumped git2 version (#6690)

Description
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Updated git2 version to latest one to be able to use latest cargo
generate as a lib in tari-dan.

Motivation and Context
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How Has This Been Tested?
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What process can a PR reviewer use to test or verify this change?
---

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Breaking Changes
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- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

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common/Cargo.toml

@@ -20,7 +20,7 @@ anyhow = "1.0.53"
 config = { version = "0.14.0", default-features = false, features = ["toml"] }
 cargo_toml = { version = "0.20.4" }
 dirs-next = "1.0.2"
-git2 = { version = "0.18", default-features = false, optional = true }
+git2 = { version = "^0.19", default-features = false, optional = true }
 log = "0.4.8"
 log4rs = { version = "1.3.0", default-features = false, features = [
     "config_parsing",