build(deps): bump indexmap from 2.5.0 to 2.6.0 (#3250)

Bumps [indexmap](https://github.com/indexmap-rs/indexmap) from 2.5.0 to 2.6.0.
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.5.0...2.6.0)

---
updated-dependencies:
- dependency-name: indexmap
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -754,7 +754,7 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "slab",
  "tokio",
  "tokio-util",
@@ -769,9 +769,9 @@ checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "hashbrown"
-version = "0.14.3"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
+checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
 
 [[package]]
 name = "heck"
@@ -968,12 +968,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.5.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
+checksum = "707907fe3c25f5424cce2cb7e1cbcafee6bdbe735ca90ef77c29e84591e5b9da"
 dependencies = [
  "equivalent",
- "hashbrown 0.14.3",
+ "hashbrown 0.15.0",
 ]
 
 [[package]]
@@ -1409,7 +1409,7 @@ name = "linkerd-distribute"
 version = "0.1.0"
 dependencies = [
  "ahash",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "linkerd-stack",
  "parking_lot",
  "rand",
@@ -1800,7 +1800,7 @@ dependencies = [
  "ahash",
  "futures",
  "futures-util",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "linkerd-error",
  "linkerd-metrics",
  "linkerd-pool",
@@ -2727,7 +2727,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4c5cc86750666a3ed20bdaf5ca2a0344f9c67674cae0515bec2da16fbaa47db"
 dependencies = [
  "fixedbitset",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
 ]
 
 [[package]]